Which deal on large bags of candy is best deal? Which is the worst deal? How do you know? Can you find more than one way to determine this? (Please help)

Product/ Cost Pieces / Cost per Piece

Runts, Gobstoppers, Baby Ruth ->
cost - $6.99
cost per price - 90

Almond Joy, Whoppers, Kit Kats
Cost - $15.99
Cost per price - 160

Starburst, Skittles, Snickers
cost - $15.99
Cost per price - 150

Life Savers Yummies, Skittles
cost - $13.69
Cost per price - 95

M&M's, Twix and more
Cost - $14.74
Cost per price - 135

Snickers
Cost - $9.94
Cost per price - 45