Finney Inc. has conducted an analysis of overhead costs related to one of its product lines using a traditional costing system (volume-based) and an activity-based costing system. Here are its results.

Traditional Costing

ABC

Sales revenue

600,000

600,000

Overhead costs:

Product Rx3

34,000

50,000

Product Y12

36,000

20,000

$70,000

$70,000

Explain how a difference in the overhead costs between the two systems may have occurred.