Please answer all three for thumbs up

Spice Inc:'s unit selling price is $48, the unit variable costs are $37, fxed costs are $103,000, and current sales are 10,800 units. How much will operating incorne change if sales increase by 5,300 units? a. 5118,800 incrase b. 5123,800 decreane e. 5177.100 increase 1. 558,300 incrase The expected average rate of retum for a proposed investment of $791,100 in a fixed asset with a useful life of 4 years, straight-line depreciation, no residual value, and an expected total income of $319,760 for the 4 years is (round to two decimal places) a. 0.81% b. 20.21% c 10.108 d. 0.400 Compute conversion costs given the following data: direct materials, $353,400; direct labor, $194,700; factory overhead, $191,200 and selling expenses, $42,400 b. 5385,900 c. 5544,600 d. 5739,300