Grocery{ name: G1  markup: 3.25  cost: 500 }Grocery
Produce{ name: P1  markup: 2.50  cost: 300 weight: 1.75 }Produce
Grocery{ name: G2  markup: 2.25  cost: 400 }Grocery
Produce{ name: P2  markup: 1.50  cost: 200 weight: 6.0 }Produce