Figure10-2The Budget Line The budget line represents all the possible combinations of quantities of potatoes and wings that Sammy can purchase if he spends all of his income. Also, it is the boundary between the set of affordable consumption bundles (the consumption possibilities) and unaffordable ones. Given that wings cost $4 per kilogram and potatoes cost $2 per kilogram, if Sammy spends all of his income on wings (bundle F), he can purchase 5 kilograms of wings; if he spends all of his income on potatoes (bundle A), he can purchase 10 kilograms of potatoes.