help 9,10,12 plz

Radley, Inc. uses a periodic inventory system. At the end of the January 31, 2017, the accounting records for the most popular item in inventory showed the following: Radiey sells the units for $20 each. At the end of the period, Radley has 134 units remaining in inventory. What is the cost of goods sold if Radley uses the LIFO method? Hadley Bear. Inc. uses a periodic inventory system. At the end of the January 31, 2017, the accounting records for the most popular item in inventory showed the following: Hadley Bear sells the units for $20 each. At the end of the period, Hadley Bear has 156 units remaining in inventory. What is value of the ending inventory if Hadley Bear uses the average cost method? Ava Electronics had cost of goods sold of $21949. If beginning inventory was $6152 and ending inventory was 55978 Ava's purchases must have been: $