Exercise 7-14 (continued)
2. The average cost per diner for each party can be computed by dividing
3. The average cost per diner differs from party to party under the activity-
based costing system for two reasons. First, the cost of serving a party
($5.50) does not depend on the number of diners in the party.
Therefore, the average cost per diner of this activity decreases as the
number of diners in the party increases. With only one diner, the cost is
The average cost per diner differs from the overall average cost of $16
per diner for several reasons. First, the average cost of $16 per diner
includes organization-sustaining costs that are excluded from the
computations in the activity-based costing system. Second, the $16 per
diner figure does not recognize differences in the diners’ demands on
resources. It does not recognize that some diners order more drinks
than others nor does it recognize the economies of scale in serving
larger parties. (The batch-level costs of serving a party can be spread
over more diners if the party is larger.)