Sandy went shopping at the mall to buy clothes for the school year. her mom gave her $600 to spend. on the light rail to the mall half 1/2 of the money fell out of her pocket. sandy bought 4 shirts for $15 each, 3 pairs of pants for $20 each, and 2 dresses priced $25 each part a: write a numerical expression to show how much money she had at the end of the mall trip part b: when she came back and told her mom about the incident her mom said she would have $430 of change is she correct or no? explain