Each day Trinh buys a can of soda at a machine in her apartment building for $.75. Instead, she could buy a 12-pack at the grocery store for $4.99. If she did this, how much money would she save in a month
assuming 30 days in a month ...
cost of one can per day from machine = 30(.75) = $22.50
cost using 12-pack
= (4.99/12)(30) = 12.48
continue