When using the cost of production report to analyze the change in direct materials cost per equivalent unit compared to conversion cost per equivalent unit, an investigation may reveal that direct materials costs:. a. will never decrease due to the way the cost is calculated.
b. will never increase due to the way the cost is calculated.
c. may increase or decrease between periods, depending on the fluctuation of the cost of the direct materials.
d. will only increase if conversion costs increase as well.

The correct answer is the option C: May increase or decrease between periods, depending on the fluctuation of the cost of the direct materials.

Explanation:

To begin with, in the field of business a manager or an account would perfectly know that when using the cost of production report with the purpose to analyze the change in direct materials costs per equivalent unit compared to conversion cost per unit the investigation will reveal that the direct material costs may increase or decrease between periods, depending on the fluctuation of the cost of those materials due to the fact that the fluctuation mentioned will arise if the company starts using more direct material in the production so that means that the volumen will increase as well as the costs of it

the first successful, urban blues recording, selling more than 75,000 copies, was made in year 1920.

mamie smith recorded the first commercially successful example of the urban blues,   with the recording of “crazy blues”."crazy blues" was recorded on august 10, 1920, in new york city. within a month of the release of “crazy blues” it had sold 75,000 copies.