Sarah W. sells sweatshirts (S), teeshirts (T), and hats (H) with the LU softball logo on them. She sells a
total of 52 items. The cost of a sweatshirt is $30, a teeshirt $10, and a hat $15. She collects a total of
$850. She sells 4 more sweatshirts than hats. Set up the system of equations that fits the following data.