Let
n--------> number of monthly payments
x-------> amount of monthly payments with Kristal's credit card
y-------> charges for every payment made with a credit card
T-------> total cost of the refrigerator
we know that
[tex] n=16\\x=\$112.75\\ y=\$1.25\\[/tex]
the total cost of the refrigerator is equal to
[tex] T=n(x+y) [/tex]
substitute the values in the formula
[tex] T=16*(112.75+1.25) [/tex]
[tex] T=16*114 [/tex]
[tex] T=\$1,824 [/tex]
therefore
the answer is
the total cost of the refrigerator is equal to [tex] \$1,824 [/tex]
