What are Units for a Cost Code?

A form of measurement, such as: HR – Hour, AC – Acre, BF – Board Foot, CF – Cubic Feet, Days – Days, EA – Each, LB – Pound, LF – Linear Foot, LS – Lump Sum, LY – Linear Yard, MO – Month, SF – Square Foot, SY – Square Yard, Tons – Tons and WK – Week.