Answer:
Here the variable cost can be computed using the following formula:
Variable cost = (Sales commissions + Shipping expense + Miscellaneous selling expenses) ×Sales
Variable cost = (4% + 1% + 3/4%) x $500,000 = $28,750
Fixed cost = Sales manager's salary + Advertising expense + Miscellaneous selling expenses
= $30,000 + $25,000 + $2,100
= $57,100
Total selling expense budget = Variable cost + Fixed cost
= $28,750 + $57,100
= $85,850