I pretty much do same as what I would do on the face, I see more gals who just don't ever exfoliate the back, and a few with acne. If it's mainly dead skin buildup I will use a good exfoliateing scrub-like salt/sugar etc., with acne, I will use either a 1-2 layer peel or emzyme peel followed by extractions.
A forward contract is an agreement between two parties to buy or sell an asset at an agreed future point in time. The trade date and delivery date are separated. A futures contract is a standardized forward contract that is traded on an exchange, like SAFEX. Other than forward contracts, futures contracts are not linked with specific buyers.
The second article you linked to (on delivery price) states it best: In forward contracts, the forward price and the delivery price are identical when the contract begins, but as time passes, the forward price will fluctuate and the delivery price will remain constant. In short, the forward price only equals the delivery price the moment the contract is created. After that, they can, and almost certainly will, differ.