Final answer:
The sale price of two cans of green beans for $1.79 is a bargain.
Step-by-step explanation:
The regular price for a 15 oz can of green beans is $0.99. The supermarket chain is advertising two cans for $1.79. To determine if this is a bargain, we can compare the price per can. The regular price per can is $0.99 / 1 can = $0.99. The sale price per can is $1.79 / 2 cans = $0.895. The regular price per can is higher than the sale price per can, so this is indeed a bargain.