called the on-cost, the two together making the total cost of produc-
tion" (1). In Advanced Accounts (Australasian Edition) by R. N.
Carter, F.C.A., 6th ed. (1939), at p. 703, it is stated that on-cost is a
term used to denote all the expenses consequent on or incidental to
production and distribution, and that factory on-cost includes all
expenses directly or indirectly connected with production. At first
sight, indirect labour would appear to include the wages of the fore-
man and timekeeper, of the mechanics who keep the manufacturing
machinery in running order, of the cleaners and watchmen, and the
wages ot all other employees whose labour contributes however
remotely to the production of the outerwear. But the prescribed
records also contain provisions for the allowance of the expenses of
manufacturing overhead. While these expenses probably refer to
payments other than salaries and wages, such as for rent, motive
power, heating and lighting, it is by no means certain that they are not
intended to include some salaries and wages. Except in the case of
the provisoes, this indefiniteness in the meaning of indirect labour
would not make the Order uncertain, because once the cost of direct
labour is ascertained, a definite percentage of that cost is allowed for
whatever is intended to be included in indirect labour, and a further
definite percentage for what is intended to be allowed in manufac-
turing overheads. But, in order to keep the three-monthly recon-
ciliation statement in the fourth schedule, the manufacturer and
maker-up must assess the value of the hours his employees were
engaged on indirect labour in respect of the goods to which the
detailed costs relate, and for that purpose determine what is
indirect labour, and whether any of that labour should be excluded
because it should be included in the expenses of manufacturing over-
heads. The separation of these items would be difficult enough in
a factory exclusively engaged in the manufacture of men's, youths'
and boys' outerwear. Where a factory was also engaged in the
manufacture of other goods the difficulties would increase, because
it would not only be necessary to determine what was indirect
labour in relation to the outerwear, but also what proportion of
the costs of indirect labour should be attributed thereto. As my
brother Dixon has said in his judgment, compliance with the
proviso involves a degree of "judgment, estimation and opinion,
matters about which there can be no exactness, certainty or
common agreement in result." In Fraser Henleins Pty. Ltd. v.
Cody (2), referring, I assume, to Vardon v. The Commonwealth (3)
and Bendixen vy. Coleman (4) he said: "It may be conceded, and,