any fees and finance charges that cannot be avoided by a recipient. (B) Open-end commercial credit plans With respect to open-end commercial credit plans, the annual percentage rate, using only the words annual percentage rate or the abbreviation APR , expressed as a nominal yearly rate, including any fees and finance charges that cannot be avoided by a recipient, based on the maximum amount of credit available to the recipient and the term resulting from making the minimum required payments term as disclosed. (C) Sales-based financing (i) In general With respect to sales-based financing, the estimated annual percentage rate, using the words annual percentage rate or the abbreviation APR , expressed as a yearly rate, including any fees and finance charges, based on the estimated term of repayment and the projected periodic payment amounts. (ii) Calculation of certain payment amounts The estimated term of repayment and the projected periodic payment amounts shall be calculated based on the projected sales volume of the recipient. (iii) Calculation of projected sales volumes For purposes of clause (ii), the projected sales volume may be calculated— (I) according to a method defined by the Director based on the historical sales volume of the recipient over a defined period of time that is used for all sales-based financing transactions by that provider