Joe jumps out of his truck and runs into a Pilot gas station store to grab a drink. While he was paying for his drink, he notices the candy bars at the counter and grabs one to buy. The candy bar in this case is a(n) .

The answer is a convenience product

Explanation:

Convenience products, also known as low involvement purchases are goods, items or consumables which consumers buy frequently without thinking too much or exerting much effort.  

This kind of products are usually of low prices and are very much available at convenient locations like drug stores, supermarkets, pilot gas station and convenience stores. Examples of convenience products include milk, candy, chocolate, laundry detergents, sugar, fast food,  and magazines.

u = 30

continuing your method

= +

subtract from both sides

= - thus

= -

= ⇒ u = 30

answerskimming;