Betty has a checking account and a non-interest bearing savings account. The function C(x), shown below, represents her checking account balance, where x is the number of months. The function S(x), shown below, represents her saving account balance. Which function represents Betty's total account balance, T(x)? T(x) = |240x + 140| + 450x + 1,500 T(x) = -|240x - 140| + 450x + 1,300 T(x) = -|240x - 140| + 450x + 1,500 T(x) = -|240x - 140| + 450x + 1,400