Given:
Supplier 1: 5.25 per bushel and delivery fee of 3 per bushel
Supplier 2: 6.50 per bushel and flat delivery fee of 1,500 per week
Order of 500 bushels of grain per week.
Supplier 1: 5.25x + 3x = 8.25x = 8.25(500) = 4,125
Supplier 2: 6.50x + 1,500 = 6.50(500) + 1,500 = 3,250 + 1,500 = 4,750
Supplier 2 costs more than Supplier 1 per week by 625.