A store had sales of $483.9 billion in 2016 and $536.4 billion in 2018. Use the Midpoint Formula to estimate the sales (in billions of dollars) in 2017. Assume that the sales followed a linear pattern.

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.