Hello! I am currently working on a perpetual inventory sheet with the FIFO method. I am having troubles finding the unit price so I can solve the equation for the total sales revenue. Thank you! I know they already have the equation set up but I don't know where the $23 came from. If anyone is able to explain where the $23 came from you would be great help! :)

Now calculate gross profit using the FIFO inventory costing method. Recall that gross profit is calculated by subtracting cost of goods sold from sales revenue. We have already determined the cost of goods sold for the period using the FIFO inventory method. Before calculating gross profit, though, we must first determine total sales for the month. Sales revenue will be the same, regardless of the inventory costing method in use. Go ahead and use the information given in the problem to determine the total sales revenue for the month