Answer:
Selling price of hockey game set is $145.32 , markup price is $210.54 and profit is $96 .
Explanation:
Let us assume that the selling price of hockey game set be x .
As given
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. 
45% is written in the decimal form .

= 0.45 
Thus the equation becomes 
0.45 × x = 65.34 
0.45x = 65.34 

x = 145.2 
Therefore the selling price of the hockey game set is $145.2 .
Thus 
Markup price = Selling price + Overhead Price
 = $145.2 + $65.34
 = $ 210.54
 As given
 If the air hockey game set costs Pyotr Tchaikovsky Sports $49.32 .
i.e Cost price of the hockey game set = $ 49.32 
Profit = Selling price - Cost price 
 = 145.32 - 49.32 
 = $ 96 
Therefore selling price of hockey game set is $145.32 , markup price is $210.54 and profit is $96 .