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A computer repair specialist charges $160 for the first two hours of repair plus an hourly fee for each additional hour. The total cost for 6 hours of repair is $360. Which function $f$ gives the total cost, in dollars, for $x$ hours of repair, where $x\ge 2$?

A

$f(x)=50x+60$

B

$f(x)=50x+160$

C

$f(x)=60x$

D

$f(x)=60x+160$