Your school is getting custom mascot t-shirts made for homecoming this year. There is an initial charge of $15 to create the silkscreen. For orders of 50 or fewer shirts, it will cost $19.00 per shirt. For an order of more than 50 but less than 100, the cost is $16.30 per shirt. For orders between 100 and 149, the cost per shirt is $13.40. If you order 150 shirts or more, the cost per shirt is $11.10. a. Write a piecewise function that gives the cost C for an order of s shirts.

b. If you order 700 shirts for Homecoming, how much would you need to sell the shirts for in order to break even.