So the finance charge for a new coffe machine is given by:
[tex]\text{ finance charge=Installment price - cash price}[/tex]The installment price was $3804.50 and the cash price $3549. We just need to replace these values in the corresponding position on the equation:
[tex]\text{ finance charge}=3804.5-3549=255.5[/tex]So the finance charge is $255.5