delivered the opinion of the Court,

The decision in this case depends upon the1 construction of an agreement between the Product Sales Company, designated as party of the first part, .and the Guaranty Company of Nary] and, as party of the second part, which includes the following provision:

“Second party will from time to time, during the continuance of this agreement, and within the limits agreed upon, buy such accounts belonging to first party, as may be acceptable to second party, and will pay therefor.

“One hundred per cent. (100%) of the net face value thereof, less a charge equal to the legal rate of interest on the money outstanding thereon, on which 77 per cent, of the net face value thereof shall be paid in cash upon acceptance thereof by second party, and the remaining 23 per cent, less any deductions and plus any overpayments by the debtors and less total charges, as shown in lines 51 to 61 hereof, to be paid to the first party immediately upon payment of any such accounts to second party, * * *”

The provision as to the total charges is as follows:

“The total compensation to be paid by first party for all services and other considerations specified in lines 13 to 17 hereof, added to the charge as mentioned in lines 13 and If hereof, it is hereby agreed shall be 1/30 of lf0 per day (1% per month), making total charge for all services 1/30 of 1% plus the legal rate of interest.”

Lines 13 to 17 of the agreement are embraced in the second of the three paragraphs we have quoted.

The service for which the contract provided, in addition to the advance of money to the defendant, consisted chiefly of extending the privilege of utilizing the plaintiff’s collection and credit departments and the advice of its officers as to bookkeeping and business efficiency. The record does not show whether the defendant availed itself of those privileges.

*680 No question of' usury is raised, and sueb a defense would not be maintainable under tbe laws of this State, since tbe defendant is a corporation. Code, art. 23, sec. 100A; Kinsey v. Drury, 146 Md. 227.

Tbe question is wbetber tbe monthly charge of one per cent, plus tbe legal rate of interest, malting a total charge of eighteen per cent., should be computed on tbe full amount of tbe “net face value” of tbe accounts transferred, or only upon the seventy-seven per cent, of such value actually advanced. In this suit to recover from tbe Product Sales Company a balance of $1,623, claimed on tbe first of tbe alternative theories just stated, tbe Guaranty Company requested and obtained instructions that “the defendant agreed to pay to tbe plaintiff interest and charges based upon 100% of the face value of accounts receivable assigned by tbe defendant to tbe plaintiff, as collateral security, for loans advanced by the plaintiff to tbe defendant,” and that “under the terms of tbe written contract entered into between tbe plaintiff and defendant and in evidence in this case, tbe plaintiff is entitled to receive from tbe defendant total compensation of 18% on the1 face value of accounts assigned by tbe defendant to tbe plaintiff as collateral security for loans.”

Prayers offered by tbe defendant limiting" tbe computation of tbe interest charged to tbe amounts actually advanced on the accounts were refused by tbe lower court.

The trial resulted in a verdict in favor of tbe plaintiff for $1,828.30, 'being tbe full amount of its claim and interest from tbe date of the suit. From tbe judgment entered on tbe jury’s verdict the defendant has appealed. The only exception in tbe record relates to tbe ruling on th© prayers.

While tbe contract used terms of purchase in reference to the transfer of accounts from tbe defendant to the plaintiff, its evident purpose was to provide for financial transactions in the nature of loans on tbe security of tbe accounts to be assigned. This theory was distinctly stated in tbe prayers which the plaintiff corporation itself offered and in accordance with which tbe verdict was rendered. It was provided *681 by the contract that the defendant assignor should have the right to collect the accounts from the debtors, after the assignment, and that until ¡payment to the plaintiffs of their face value the defendant should pay compensation at the rate of one per cent, monthly plus legal interest. The purposes of a series of loans were thus accomplished by transactions which were described as purchases in the contract. Analogous contracts were so construed in Home Bond Co. v. McChesney, 239 U. S. 568; Dorothy v. Commonwealth Commercial Co ., 278 Ill. 629; and other eases cited in L. R. A. 1917-E, 1122. It is conceded that the verdict was for a proper amount if the plaintiff had a right to calculate the eighteen per cent, charges upon the amount of the net face value of the assigned accounts. On the¡ other hand there w:as proof that if the charge® ought to be .reckoned only upon the amounts advanced to the defendant under the contract, the plaintiff’s claim has been over-paid.

In providing for the payment of one hundred per cent, of the net face value of the accounts, “less a charge equal to the legal rate of interest on the money outstanding thereon, on which 77 per cent, of the net face1 value” should be paid on acceptance of the accounts, and the remaining twenty-three per cent, when they were finally settled, the contract made a clear distinction between their face value and the amounts advanced upon them to the defendant at the time of their transfer. If the interest was to be charged on the face value of the accounts, notwithstanding the fact that only seventy-seven per cent, of that value was advanced, the agreement would certainly have so stated, instead of substituting for the term “face value” the words “money outstanding thereon,” as a designation of the amount upon which the interest should be computed. The subsequent provision for compensation at the rate of one per cent, monthly in addition to the legal interest rate does not change the basis of the calculation. It simply adds the monthly rate to the legal interest charge previously specified. The only described basis of any charge was the “money outstanding.” So far *682 as the provision for the payment of interest or other compensation to the plaintiff was concerned, the only money outstanding w.as that advanced when the accounts were accepted. In our opinion the plain intent of the contract was to make the money actually advanced the basis of the total eighteen per cent, charge for which it provided.

It is argued that a different interpretation of the contract is required because during, the course of a long series of settlements under its terms the interest and other charges deducted by the plaintiff were calculated upon the face value of the accounts which had been assigned. If the agreement were ambiguous as to the basis of the charges, the conduct, of the parties could be considered upon the question as to its proper construction. But as there is no. uncertainty in its- provision as to the amounts upon which the interest .and additional compensation must be computed, the submission of the defendant to erroneous exactions in the course of the previous accounting should not control our decision as to the meaning and effect of the contract in regard to the liability asserted in this action. Citizens’ Fire Insurance Co. v. Doll, 35 Md. 89; Calhan v. Linthicum, 43 Md. 103; Buffalo Steel Co. v. Kirwan, 138 Md. 66; 13 C. J. 548; 6 R. C. L. 854.

There was error in the instruction, granted at the plaintiff’s request, which declared the meaning of the contract between the parties to be that the defendant was liable for interest and other charges at the rate of eighteen per cent, o ftke full face value of the accounts assigned to the plaintiff, and the judgment must be reversed because of that ruling. _

Judgment reversed, with costs, and new trial awarded.