Subject: mathqa
Question: a clothing store purchased a pair of pants for $ 90 and was selling it at a price that equaled the purchase price of the pants plus a markup that was 25 percent of the selling price . after some time a clothing store owner decided to decrease the selling price by 20 percent . what was the clothing store ' s gross profit on this sale ?
Option: 
A: $ 8
B: $ 5
C: $ 6
D: $ 10
Answer: C