Problem
Iris Souza started the summer with $50. She took $25 and made signs for her dog walking service. She posted the signs all over her neighborhood. She used the other $25 to buy a stout leash and a pooper-scooper. At the end of the summer, after buying herself a new pair of shoes for $65 (she had worn her other shoes out walking dogs), she had $325 left. Calculate Souza's costs for her summer job?