can you please help understand this concept? thank you!

Required information [The following information applies to the questions displayed below.] Bodin Company manufactures finger splints for kids who get tendonitis from playing video games. The firm had the following inventories at the beginning and end of the month of January. The following additional data pertain to January operations. The company applies manufacturing overhead at the rate of 60 percent of direct-labor cost. Any overapplied or underapplied manufacturing overhead is accumulated until the end of the year. 4. Compute the cost of goods sold for January