?Mr. Green makes salads. The standard plate of salad has 30 g of lettuce (L), 50 g of peppers?(P) and 80 g of beetroot (B). The standard prices of the three ingredients are $0.2/kg,?0.4/kg and 0.8/kg respectively.?
Mr. Green has been experimenting and so in July he changed the mix of vegetables on the?plate thus: 1,500 plates contained 62,000 grams of lettuce, 81,000 grams of peppers and?102,000 grams of beetroot.?
What is the yield variance (do not round your answer)??