Between the hours of 4 PM and 8 PM, the temperature decreased by 4 degrees every hour. If the temperature was 2 degrees at 4pm, what was the temperature at 8pm?

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.