A grocer sells apples for $1. 35 each, pears for $1. 45 each and oranges for $1. 60 each. She also offers a discount of 70c for anyone who buys two pieces of fruit, and a discount of $1. 60 for anyone who buys three pieces of fruit. One day she sells 50 pieces of each type of fruit, for a total of $202. How many customers did she have, assuming each customer bought 1, 2 or 3 pieces of fruit?.