A method and a computer for performance of the method. fraction c) consisting of compounds which are a factor in methionine metabolism, which fraction contains at least one member selected from the group consisting of folic acid, vitamin B12, vitamin B6, magnesium and zinc. The recording stack may be provided with both silicon nitride and silicon dioxide top layers, with the silicon dioxide layer acting as a sacrificial layer to ensure that the hard layer, of silicon nitride, remains at the end of the process. Examples of data categories that may be collected include, but are not limited to, information about: the merchant, the customer, the requested transaction, the merchandise being returned, one or more receipts, a clerk processing the transaction, and other general applicable information. The dispenser housing can be provided with a movable tray in the bottom of the dispensing cavity. The sacrificial gate stack is removed.