A crockery company makes china cups and saucers. How much clay would they need to buy if: - a cup uses 100g of clay - a saucer uses 150g of clay - it plans to make 450,000 cups and 280,000 saucers - there is no opening inventory - it would like to have closing inventories of 4,000kg of clay? a. 87,000 Kg b. 99,500 Kg c. 91,000 Kg d. 83,000 Kg