$7)$ first In$,$ First Out:

a$)$Often parallels actual physical flow of merchandise

b$)$Companies determine cost of ending inventory by taking unit cost of most recent purchase and working backward until all units of inventory have been costed

c$)$Costs of earliest goods purchased are first to be recognized in determining cost of goods sold

d$)$ are a part of First In$,$ First out

e$)$Only two parts are part of First In$,$ First Out

f$)$All are a part of First In$,$ First Out