0. Two competing fast food restaurants sell both hamburgers and orders of french fries at
the same prices. Burger Planet's lunchtime sales can be modeled as
40h + 70f $260.00 where h is the cost of a hamburgerſand f is the cost of an order
of french fries. If Slider Heaven sells 80 hamburgers and 60 orders of french fries over
the same period and outsells Burger Planet by $100, what is the total cost of three
hamburgers and three orders of french fries at either establishment?