Help! How do I do this commission problem? (7th/8th grade math)?

Question

Your sister works part-time at an electronics store. Her weekly salary is $100 plus 5% commission on her total sales.

Find her total sales when her total income for the week is $300.

And how do I this problem too!

When her sales are more than $1500, she recieves a $150 bonus. Use your awnser from the previous question (^^^^^^^^^^^^) to determine whether she will recieve this bonus.

Answer 1

Part 1
She made $300 - $100 (base salary) = $200
$200/.05 = $4000 in sales

Part 2
If she gets $150 bonus over $1500 (because we now she sold $4000)
Then her income would be $450 ($100=$200commision+$150bonus)

Answer 2

Commission Math Problems

Answer 3

You would get total income by getting the set value (100) and adding the partial value (5% of whatever you sell). So:

300 = 100 + .05x
-100 -100
------------------------
200 = .05x (now divide by .05)

x = total sales = $4000

Hope that helps!

EDIT: That is more than $1500, so she gets the $150 extra. (Yay)

Answer 4

.05x=200
x=total sales

so is x large enough to get the bonus? All they want is a yes or no for that part.