A promotion included a $2.5 mail-in rebate for the purchase of a 10-liter
bottle of milk and a store coupon for $1.39 off a 5-liter bottle of vegetable
oil. Jesse Gatling bought one 10-liter bottle of milk for $33.00 and a 5-liter
bottle of vegetable oil for
$26.89. Calculate his total cost if an envelope costs $0.10 and a stamp costs
$0.28.