Charlie bought 3 tennis rackets at 54.20 each. He sold two of them at a price that was 25% more than what he paid. He sold the third one at a price that was 20% less than what he paid. How much money did he receive from selling the 3 tennis rackets?

The total cost of the 3 tennis racks was 3 * 54.20 = $162.60

The selling price of the first two rackets was 54.20 * 1.25 = $67.75 each
He made 2 * 67.75 = $135.50 from selling the first two rackets
The selling price of the third racket was 54.20 * 0.80 = $43.36
In total, he made 135.50 + 43.36 = $178.86 from selling the three tennis rackets.