yield variance

sir i saw your lecture on yield variance which is great by the way,but i am confused according to your method answer should be {B} but answer is {A} the only difference is my answer is adverse but answer is {A} which is favourable..kindly help..

3 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)?
A $2.8125 Fav
B $2.8125 Adv
C $2,812.5 Fav
D $2,812.5 Adv