only formulate model

In the Ma-and-Pa grocery store, shelf space is limited and must be used effectively to in- crease profit. Two cereal items, Grano and Wheatie, compete for a total shelf space of 60 ft? A box of Grano occupies .2 ft? and a box of Wheatie needs.4 ft?. The maximum daily demands of Grano and Wheatie are 200 and 120 boxes, respectively. A box of Grano nets $1.00 in profit and a box of Wheatie $1.35. Ma-and-Pa thinks that because the unit profit of Wheatie is 35% higher than that of Grano, Wheatie should be allocated 35% more space than Grano, which amounts to allocating about 57% to Wheatie and 43% to Grano. What do you think