please answer the following questions and explain where necesary.

include formulas.

#10 The manager of 123 Cars reviewed his monthly operating costs for the past year. His costs ranged from $5,000 for 1,000 inspections to $3,500 for 600 inspections. Using the High-Low Method, what is the variable cost per inspection and total fixed cost? #11 Sally's Shows has a theater with variable costs of $20 per guest. Sally's fixed costs are $55,000. They sell each ticket for $45 but are considering lowering the price to $35. If they do this how many tickets do they need to sell to breakeven and is it an increase or decrease from the previous breakeven point before the selling price was changed