please help me solve this

Midori and Tremaine are in the 24% tax bracket, file jointly, and take the standard deduction. How much will their tax bill be reduced if they qualify for a $1200 refundable tax credit? How much will it be reduced by a $1200 tax-deductible expense? Midori and Tremaine's tax bill will be reduced by $ if they qualify for a $1200 refundable tax credit. (Round to the nearest dollar as needed.) Midori and Tremaine's tax bill will be reduced by $ from a $1200 tax-deductible expense. (Round to the nearest dollar as needed.)