Q.Express in one word/term: Numbers, letters or both are used to identify an overhead expenditure.

Codification is the technique of allotting a short, systematic code number or symbol to every item and group of overhead so it can be recorded and analysed quickly and without confusion; codes may be straight-numbered, block/decimal (a range per group), mnemonic (letters) or alpha-numeric. Codification speeds recording, avoids confusion between similar items, groups related costs automatically and suits computerised accounting. Collection of overhead is the first practical step — gathering and accumulating each indirect cost a …