
these costs are recorded. (Only variable manufacturing costs would be
included in product cost for units going into the increase in inventory.)
Generally accepted accounting principles require that full product cost (variable
plus fixed manufacturing costs) be used for recording an increase in inventory.
However, as the example in Figure 11-1 shows, producing more than you sell
does boost profit.
Let me be very clear here: I’m not suggesting any hanky-panky in the example
shown in Figure 11-1. Producing 10,000 more units than sales volume during
the year looks — on the face of it — to be reasonable and not out of the ordi-
nary. Yet at the same time, it is naïve to ignore that the business did help its
pretax profit to the amount of $3.5 million by producing 10,000 more units than
it sold. If the business had produced only 110,000 units, equal to its sales volume
for the year, all its fixed manufacturing costs for the year would have gone into
cost of goods sold expense. The expense would have been $3.5 million higher,
and EBIT would have been that much lower.
Cranking up production output
Now let’s consider a more suspicious example. Suppose that the business
manufactured 150,000 units during the year and increased its inventory by
40,000 units. It may be a legitimate move if the business is anticipating a big
jump in sales next year. On the other hand, an inventory increase of 40,000
units in a year in which only 110,000 units were sold may be the result of a
serious overproduction mistake, and the larger inventory may not be needed
next year. In any case, Figure 11-2 shows what happens to production costs
and — more importantly — what happens to the profit lines at the higher
production output level.
The additional 30,000 units (over and above the 120,000 units manufactured
by the business in the original example) cost $410 per unit. (The precise cost
may be a little higher than $410 per unit because as you start crowding pro-
duction capacity, some variable costs per unit may increase a little.) The
business would need $12.3 million more for the additional 30,000 units of pro-
duction output:
$410 variable manufacturing cost per unit × 30,000
additional units produced = $12,300,000 additional
variable manufacturing costs invested in inventory
Again, its fixed manufacturing costs would not have increased, given the
nature of fixed costs. Fixed costs stay put until capacity is increased. Sales
volume, in this scenario, also remains the same.
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