posted by sahar .
teemu's t-shirts designs and manufactures t-shirts for a $15 flat design rate and $7.50 for each t-shirt.he wants to sell his t-shirts to the senior class for their graduation party. he is going to charge them $10 for each t-shirt.
a) write a function,c, representing the cost of,t,t-shirts.
b) write a function,I, representing the income that teemu will generate from the sale.