Problem 5-30 graphing; incremental analysis; operating leverage [lo5-2, lo5-4, lo5-5, lo5-6, lo5-8][the following information applies to the questions displayed below.] angie silva has recently opened the sandal shop in brisbane, australia, a store that specializes in fashionable sandals. in time, she hopes to open a chain of sandal shops. as a first step, she has gathered the following data for her new store: sales price per pair of sandals$40variable expenses per pair of sandals 20contribution margin per pair of sandals$20fixed expenses per year: building rental$10,000equipment depreciation 8,000selling 8,000administrative 14,000total fixed expenses$40,000problem 5-30 part 1required: 1. what is the break-even point in unit sales and dollar sales? (do not round intermediate calculations.)