A school choir needs to make T-shirts for its 75 members and has set aside some money in their budget to pay for them. The members of the choir
decided to order from a printing company that charges $3 per shirt, plus a
$50 fee for each color to be printed on the shirts.
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(The fee applies to the order, not to individual shirts)
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In this situation, which quantities do you think can vary (change)?

A) the number of shirts ordered
B) the cost of each shirt
C) the cost of each printing color
D) the number of colors on a shirt
E) the total cost of the order