Can you please show me the formulas on how to get these answers in excel?

1.Bubba's Steakhouse has budgeted the following costs for a month in which 1,600 steak dinners will be produced and sold: Materials, $4,080; hourly labor (variable), $5,200; rent (fixed), $1,570; depreciation, $760; and other fixed costs, $540. Each steak dinner sells for $13.60 each. How much would Shulas profit increase if 10 more dinners were sold?

2.Stellar Company has the following sales, variable cost, and fixed cost. If sales increase by $10,000 then their profit increases/decreases by how much? Sales $50,000 Variable Costs $7,000 Fixed Costs $29,000

3.Total costs were $79,700 when 28,000 units were produced and $92,500 when 39,000 units were produced. Use the high-low method to find the estimated total costs for a production level of 32,000 units.