Respuesta :
First figure out his total bill by adding up what he buys.
[tex]\sf 78.04+24.81+17.96=\$120.81[/tex]
Now subtract the discount of $20 since his purchase was above $100:
[tex]\sf 120.81-20=\boxed{\sf\$100.81}[/tex]
[tex]\sf 78.04+24.81+17.96=\$120.81[/tex]
Now subtract the discount of $20 since his purchase was above $100:
[tex]\sf 120.81-20=\boxed{\sf\$100.81}[/tex]