Ms. Pinag pala owns a souvenir shop .Ms. Pinag pala purchased P 40,000 worth of souvenir items for resale at the beginning of February 2020 and another P 40,000 in August 2020.After she purchases in August,she found out that 50% of the items were defective. Although she returned half of the second purchases,she did not replenish it . Because she realized the stocks left from last year was still plenty. The inventory record on books is P 110,000. This year's ending inventory is P 35,000. Calculate COGS. Show your computation below.