Bethany K.

asked • 06/09/19

Salary plus Commision Equation

Jasmin gets paid a base salary of $700 a week. She also gets paid an additional $20 for ever 50 items she sells.


I have to write an expression to represent this relationship. I have an equation but I don't know how to make it work for $20 for every 50 items instead of adding a percent of $20 for every item.


P = Pay check N = Number of Items Sold


P = $700 + (N/50) x $20


It works fine if the number of items sold is a multiple of 50 but fails if it any other number


Example:

P = $700 + (50/50) x $20 = $720 It Works!

P = $700 + (82/50) x $20 = $732.8 It fails it should be $720 because she only sold 1 group of 20 items so she should only get an extra $20 not a percent of $20.


How do I fix my equation So it works all the time?


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