Write an algebraic model for the situation and evaluate it for the given information. You are going shopping for some new sweaters, t-shirts, and pants. Sweater (s) cost $30, t-shirts (t) cost $19, and pants (p) cost $18. What algebraic expression models the total cost of the clothes that you buy? Suppose you bought 26 sweaters, 9 t-shirts, and 23 pairs of pants. How much did you spend?
a) 30s+19t+18p; $1,104
b) 26s+9t+23p; $1,104
c) 30s+19t+18p; $1,178
d) 26s+9t+23p; $1,178