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A computer repair specialist charges $160 for the first two hours of repair plus $40 for each additional hour. The total cost for $x$ hours of repair is given by a function $f$, where $x\ge 2$. Which function $f$ gives the total cost?

A computer repair specialist charges $160 for the first two hours of repair plus $40 for each additional hour. The total cost for $x$ hours of repair is given by a function $f$ where $x\ge 2$. Which function $f$ gives the total cost?

A

$f(x)=40x+80$

B

$f(x)=40x+160$

C

$f(x)=60x$

D

$f(x)=60x+160$