Final answer:
The total cost of dental supplies used by Cullumber Company for the month is $1,670, calculated by subtracting the remaining inventory from the initial purchase of supplies.
Step-by-step explanation:
The student is asking about calculating the total cost of dental supplies for Cullumber Company for the month of January. To find the total cost of supplies, we need to consider both the purchase of supplies and the remaining inventory at the end of the month. The company initially purchased $2,340 of dental supplies and at the end of January, they determined that $670 of supplies were still on hand. Therefore, the cost of supplies used during the month is $2,340 (purchased amount) minus $670 (ending inventory), which equals $1,670.