Windathon, Inc. expects sales volume totaling $500,000 for June. Data for the month follows: Sales commissions 4% of sales Sales manager's salary $30,000 per month Advertising expense $25,000 per month Shipping expense. 1% of sales Miscellaneous selling expenses $2,100 per month plus 3/4% of sales How much is Windathons selling expense budget for June? Entry field with correct answer $57,100. $30,850. $83,750. $85,850.

I would like to know how to get 28,750 from adding up (4%+1%+3/4%) x 500,000? I keep getting 400,000. I don't get it?