Question

Mr. Cho sells a computer from the company and is paid $2000 plus $120 for each computer he sells every month. What is the minimum number of computers he need to sell in a month to make at least $2700 this month?

Answer 1

Explanation:

so, that means he gets a basic salary of $2000 per month, plus a bonus of $120 for each sold computer.

the function for his salary is then depending on the number c of sold computers :

S(c) = 2000 + 120c

now, S(c) should be at least $2700. what is the minimum number c to give us a result of at least 2700 ?

2700 = 2000 + 120c

700 = 120c

c = 700/120 = 70/12 = 35/6 = 5.833333333...

since he cannot sell only parts of a computer, we need to round up to the next whole number : 6

he has to sell at least 6 computers to make at least $2700 this month.