The cost i dollarsof manufacturing w wing nuts is given by the expression 0.07w + 13.3. Find the cost when 375 wing nuts are made. What is the average cost to manufacture one wing nut?

Put in 375 for w, and compute the cost.

Average cost= costabove/w

I'm sorry this still is not helping me. Show me the rule or formula and I can solve it.

0.07(375)+13.3