8.875% = 0.08875
A 22.50 shirt would cost after sales tax:
[tex]22.5 \times 0.08875 = \boxed{24.50}[/tex]
A 6,500 car would cost after sales tax:
[tex]6,500 \times 0.08875 = \boxed{7076.88}[/tex]
A house for 750,000 would cost after sales tax:
[tex]750,000 \times 0.08875 = \boxed{816,562.50}[/tex]