The Lakewood baseball team is selling T-shirts for a fundraiser. The shirts cost $100 for the printing design and setup, plus $10 per shirt. The team is going to sell the shirts for $15 each. How many shirts do they need to sell to break even?

____ shirts

They need to sell 20 shirts to break even.

Calculation:
Total cost = Printing design and setup cost + (Cost per shirt * Number of shirts)
Total cost = $100 + ($10 * Number of shirts)
Total cost = $100 + $10x

Total revenue = Selling price per shirt * Number of shirts
Total revenue = $15 * Number of shirts
Total revenue = $15x

Break even point:
Total cost = Total revenue
$100 + $10x = $15x
$100 = $5x
x = 20

Therefore, they need to sell 20 shirts to break even.