Mandy drives her car a total of 30,000 miles (18,000 business miles) during 2021 . Read the Data table Requirement a. What amount is deductible if Mandy uses the standard mileage method? The amount deductible using the standard mileage method is Requirements a. What amount is deductible if Mandy uses the standard mileage method? b. What amount is deductible if Mandy uses the actual cost method? c. Can taxpayers switch back and forth between the mileage and actual methods each year? (The standard mileage rate method permits a deduction based on a mileage rate of 56 cents per mile for the year 2021.)