... 13 put - 13 put Price* Futures Price - 13 call + 13 call Price*$15 $15 + $0 - $.50 $14.50 $15 $15 - $2 + $.50 $13.50$13 $13 + $0 - $.50 $12.50 $13 $13 - $0 + $.50 $13.50$11 $11 + $2 - $.50 ... demand,mainly for cheese and cheese products, have brought about a price equilibriumbetween the supply of milk and the uses of milk. Thus, any seasonal changes in theproduction or demand for ... industry-wide surveys on cheese, whey, and butter cashtransactions. These prices are volume-weighted and incorporated into a pricingformula to determine the monthly Class III price for milk...