There are three different bags of pretzels are sold at the store which bag of pretzels is the best by 810 ounces for $1.10 B 12 ounces for $1.38 see 6 ounces for $.84

Answer 1

the product with the lowest unit rate is presumably the best buy. So, just compare
1.10/810
1.38/12
0.84/6

I suspect a typo for the 810-oz product ... Probably just 10, right?