is $2023.$

Required:

a$.$ Compute the after$-$tax cost of these expenses assuming that Ms$.$ Lincoln doesn't itemize deductions on her Form $1040.$

b$.$ Compute the after$-$tax cost of these expenses assuming that Ms$.$ Lincoln itemizes deductions, her AGI is $$64,400,$ and her marginal tax rate is $22$ percent.

c$.$ Compute the after$-$tax cost of these expenses assuming that Ms$.$ Lincoln itemizes deductions, her AGI is $$209,200,$ and her marginal tax rate is $32$ percent.