Consider the following historical data for Razor Corp. 2019 2020 Revenue Cost of goods sold Gross margin Operating expenses Operating income $28,000 12,000 16,000 4,000 12,000 $23,000 10,000 13,000 4,000 9,000 2021 $24,000 12,000 12,000 5,000 7,000 In 2022, Razor expects revenues to increase by $1,000. Estimate Razor's (1) cost function; (2) contribution margin; (3) projected operating income; and (4) break-even point in sales dollars in 2022, using the high-low method.

In 2022, Razor expects revenues to increase by $1,000. Estimate Razor's (1) cost function; (2) contribution margin; (3) projected operating income; and (4) break-even point in sales dollars in 2022 , using the high-low method