The parents' club has $2,500 to invest in printed shirts to sell at their fundraiser. What is the maximum number of shirts that they can buy?

Quantity; 101-150 / 151-200 / over 200

Price per shirt; $18 / $15 / $11

Total amount to be invested = $2,500.

First given price for a printed shirt = $18.

Number of shirts that they can buy = Total money : Price of each shirt.

a) For unit price $18 number of shirts can buy = 2,500/18 = 138.89, so approximately 138 (because it's less than 139).

Therefore, with unit price $18 the maximum number of shirts can buy = 138 shirts.

a) For unit price $15 number of shirts can buy = 2,500/15 = 166.67, so approximately 166 (because it's less than 167).

Therefore, with unit price $15 the maximum number of shirts can buy = 167 shirts.

a) For unit price $11 number of shirts can buy = 2,500/11 = 227.27, so approximately 227 (because it's less than 228).

Therefore, with unit price $11 the maximum number of shirts can buy = 227 shirts.

Therefore, with least unit price $11, maximum number of shirts could be buy and that is 227 shirts which is over 200.