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How do you use the additive inverse to evaluate an expression that uses subtraction in a full sentence

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Combine the information in the problem and the chart using the average balance method to solve the problem.