Using a Computer Spreadsheet to Solve Multiple$-$Product Break$-$Even: Varying Sales Mix More$-$Power Company has projected sales of $75,000$ regular sanders and $30,000$ mini$-$sanders for next year. The projected income statement is as follows:$1.$ For each of the following possible sales mixes, calculate operating income: $2.$ Calculate the break$-$even units for each product for each of the preceding sales mixes. Round the number of break$-$even packages to two decimal places $($and use this figure for intermediate calculations$).$ Round the number of break$-$even regular and mini$-$sanders the the unit.