Business consignment contract How to calculate per diem.

I am a freelancer. Since the business consignment contract was terminated on January 10th, I was told that I would be billed on a prorated basis for the month of January. As for the daily rate, my understanding was that it should be divided by the number of working days (not including weekends), but the other party told me to calculate for one month (30 days). Isn't it usually prorated by the number of working days? The contract doesn't even mention that. Also, one more thing. Unless there is a description in the outsourcing contract, even if there were months when there was no work, there is an obligation to pay the specified amount, right? From the other party, I'm paying for it even though I don't have any work! It is said. We will not move without a request from the other party. Thank you very much. [Question] (1) How to calculate the daily rate of outsourcing. working days? Or for a month? (30 days) ②Is there an obligation to be paid even in the month when there is no work? that's all.

About how to calculate the daily rate of the outsourcing contract.