it's cheaper to buy 1 tin of tuna (for $1.08) 6 times as buying that equals $6.48 but if you brought 6 tines for the price of 5 it would cost $6.50. but it is only a 2 cent price gap.
Are 6 tins of tuna for the price of 5 a better deal then 1 tin for $1.08 save 22c?
For 1 tin for $1.08, then in this case, 6 tins would cost 6.48.
so the first deal is cheaper than the second deal by 1.48 dollars.