Store A sells lawnmower fuel for $4.00 per gallon. Store B sells containers of fuel for $4.00 each. The cost of fuel at either store can be modeled by the function c(n) = 4n, where n is the number of gallons of fuel for Store A and n is the number of containers of fuel at Store B. The domain of c(n) = 4n is all real numbers. For each store, drag all the additional restrictions needed on values of n for c(n) to model each situation.