Bonita Marine Products began the year with 12 units of marine floats at a cost of $11 each. During the year, it made the following purchases: May 5, 31 units at $15; July 16, 16 units at $20; and December 7, 21 units at $23. Assume there are 26 units on hand at the end of the period. Bonita uses the periodic system. Bonita Marine Products began the year with 12 units of marine floats at a cost of $11 each. During the year, it made the following purchases: May 5, 31 units at $15; July 16, 16 units at $20; and December 7, 21 units at $23. Assume there are 26 units on hand at the end of the period. Bonita uses the periodic system