Question 400803
.15S>275+.10S
.15S-.10S>275
.05S>275
S>275/.05
S>$5,500 MONTHLY SALES TO MAKE BOTH DEALS EQUAL.
PROOF:
LET S=5,501
.15*5,501>275+.10*5,501
825.15>275+550.10
825.15>825.10