A company charges $7 for a T-shirt and ships any order for $22. A school principal ordered a number of T-shirts for the school store. The total cost of the order was $1,520. How many T-shirts did the principal order?
69
150
214
220
Let's assume the number of T-shirts the principal ordered is x.
The cost of the T-shirts is 7x.
The cost of shipping the order is $22.
So the total cost of the order is 7x + $22 = $1520.
Subtracting $22 from both sides of the equation, we get 7x = $1520 - $22 = $1498.
Dividing both sides of the equation by 7, we get x = $1498 / 7 = 214.
The principal ordered 214 T-shirts. Answer: \boxed{214}.