Each handler shall make a payment to the producer-settlement fund in a manner that provides receipt of the funds by the market administrator no later than the 12th day after the end of the month (except as provided in §1000.90). Payment shall be the amount, if any, by which the amount specified in paragraph (a) of this section exceeds the amount specified in paragraph (b) of this section:

(a) The total value of milk of the handler for the month as determined pursuant to §1005.60; and

(b) The sum of the value at the uniform prices for skim milk and butterfat, adjusted for plant location, of the handler's receipts of producer milk; and the value at the uniform price, as adjusted pursuant to §1005.75, applicable at the location of the plant from which received of other source milk for which a value is computed pursuant to §1005.60(e).