For June, Vaughn Manufacturing estimated sales revenue at $600000. It pays sales commissions that are 4% of sales. The sales managers salary is $295000, estimated shipping expenses total 1% of sales, and miscellaneous selling expenses are $15000. How much are budgeted selling expenses for the month of July if sales are expected to be $540000? a)$27000 b)$42000 c)$340000 d)$337000