Bunuel wrote:

A salesperson earns 900 dollars per month plus a 10% commission on all sales over 1,000 dollars. One month she sells r dollars' worth of merchandise where r > $1000. How many dollars does she earn that month?

(A) 800 + 0.1r

(B) 800 - 0.1r

(C) 900 + r

(D) 900 - 0.1r

(E) 810 + 0.1r

soln::

900 dollars is the Fixed Amount which she will get every month

plus a 10% commission on sales over 1000

as she sell "r" dollars of merchandise

and "r">1000

therefore

her net commission would be

= 900 + 10%(1000-r)

=800+0.1r

ans

so Option A is the anser

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