Dear Sir, On one hand, prime cost is defined as the total of all direct costs. Accordingly, I can understand that prime cost includes both direct production costs and direct non-production costs (e.g. commission paid to salesperson based on her sales volume).
Meanwhile, inventories are valued based on product costs, including prime costs plus production overheads… From this, I should understand that prime cost includes only direct production costs.
Can you please help me to clarify this? Thank you so much!