Current Attempt in Progress Sheridan Company had 510 units of 'Dink" in its inventory at a cost of $5 each. It purchased, for $2370, 300 more units of "Dink". Sheridan then sold 620 units at a selling price of $10 each, resulting in a gross profit of $2230. The cost flow assumption used by Sheridan O cannot be determined from the information given O is weighted average O is LIFO Is FIFO