You are ordering t-shirts for your new club and need to try and determine where to order from. We know the following: Timmy's T-shirts has a flat rate of $20 no matter what and a rate that depends on how many shirts you order. If you order 9 shirts or less, it is $3 per shirt. If you order between 10 and 49 shirts, it is $2 per shirt. 50 or more shirts is $1 per shirt. Carmen's Camisetas has an initial fee of $10 and charges $4 per shirt regardless of how many shirts you order. What piecewise function can be used to determine the cost of t-shirts from Timmy's T-shirts?​