Walks Softly sells customized shoes. Currently, it sells 25,800 pairs of dress shoes annually at an average price $60 a pair. It is considering adding a Lowe-priced line of shoes that will be priced at $30 a pair. Walks Softly estimates it can sell 45,000 pairs of the Lowe-priced shoes but will sell 8,000 fewer pairs of the higher-priced dress shoes by doing so. What should annual sales revenue be used when evaluating the addition of the lower-priced shoes?