Patent ID: 6988078

Claim:
A system for controlling currency exchange and merchandise sales on an aircraft with a passenger load, which comprises: a) a service cart; b) a security drawer assembly removably mounted in the service cart, wherein the security drawer assembly includes: a body having a sleeve with an open end and a passage open at said end; a body-mounting mechanism connected with said body for removably mounting the body within the service cart; and a security drawer movably mounted in the sleeve, the security drawer having, when the security drawer assembly is mounted in the service cart: a locked, closed position such that the body cannot be removed from the service cart when the security drawer is in the locked, closed position; and an unlocked, open position such that an interior of the security drawer may be accessed when the security drawer is in the unlocked, open position; c) a currency inventory including at least two different currencies stored in the interior of said security drawer such that the currency inventory may be accessed when the security drawer is in the unlocked, open position; d) an inventory of merchandise stowed in the service cart; e) the service cart being stowable on the aircraft and movable through the cabin thereof; f) a point-of-sale computer receiving currency and merchandise inventory data; and g) said point-of-sale computer being operable by a flight attendant to record transactions with said merchandise and said currency.