Explanation:
oh, come on. you need help to add some numbers that are all there ? and then divide them by 3 ?
first and last month = 2 months = 2×840 = $1,680
deposits = $500 + $265 = $765
1680 + 765 = $2,445
this is what they have to pay in total.
now they split this evenly between them (Keyon and 2 of his friends means 3 people) :
2445 / 3 = $815
this is what each has to pay.