The commission is 5% on everything she sells
If she sold $1650.00
First you have to find her commission 
100%=1650
 5%=x
100•x=1650•5
100•x=8250
—— ———
100 100
 x=82.5(this is her commission)
 Now you have to add $82.5 to total she earns in the week.
 $400.00+ $82.5 = $482.5 
The Vanessa’s total pay last week was $482.5