Final answer:
Under the FIFO method, after selling one unit, the remaining inventory cost for the business would be $230, which includes one unit at $50 and three units at $60 each.
Step-by-step explanation:
The question involves calculating the cost of the inventory remaining using the FIFO (First In, First Out) method. The business purchased two units at $50 each and then three units at $60 each. Under FIFO, the oldest costs (the first costs incurred) are the first to be removed from the inventory when a sale is made. Therefore, when one unit is sold, it would be one of the $50 units.
Here's the breakdown of the remaining inventory after selling one unit:
1 unit remaining from the first purchase at $50
3 units from the second purchase at $60 each ($60 x 3 = $180)
Adding the cost of the remaining units gives us $50 (from the first purchase) + $180 (from the second purchase) = $230.
Thus, the correct answer is C. $230.