please help I've been stuck on this question for my quiz and I dont know what to do
Bartlett Electronics pays all sales representatives 4% commission on the first $35,000 of their individual sales and 7% commission on their individual sales in excess of $35,000. Assume that John Morgan sold merchandise valued at $73,500 during the month of November.
Calculate the following amounts.
(a) Commission on sales in the sales base: $
(b) Commission on additional sales: $
(c) Gross pay: