Problem $1-47($LO $1-3)($Algo$)$

Given the following tax structure, what minimum tax would need to be assessed on Shameika to make the tax progressive with respect to average tax rates?

$\backslash$table$[[$Taxpayer$,$Salary,$\backslash$table$[[$Muni$-$Bond$],[$Interest$]],$Total Tax$],[$Mihwah$,$$$15,000,$$$5,250,$$$1,500$