how we got the 19 ?

Detailed Calculations 54 Total Units Ending units Units sold Total From Date Cost of Goods sold Units Unitat 1 Jan 15 7-A 21 11-Dec 37 O Cost of Goods S4,000.00 SALD SS. 100.00 $9.00 S5.10 1612 Total Date To 15 S4.000.00 S4.600.00 $5,100.00 11-Dec Total 3 $91,00 17.30 Date BETREE So. 00 S96.50 991,80 Unicou 1-Jan 15 S4.000.00 7-Aug 20 SA_600.00 = 11-Dec SS. 100.00 54 Cost of Goods sold AMOUNT QUANTITY $ 34,400 1 Units 37 $ 4.600.00 Total Weighted Average IRATE 54,600.00 Cost of Goods sold 5 70200 Cost of Goodsad FO 2 UFO Weighted average Method $ 147,559 $14.29 $ 148,517 Detailed Calculations 54 Total Units Ending units Units sold Total From Date Cost of Goods sold Units Unitat 1 Jan 15 7-A 21 11-Dec 37 O Cost of Goods S4,000.00 SALD SS. 100.00 $9.00 S5.10 1612 Total Date To 15 S4.000.00 S4.600.00 $5,100.00 11-Dec Total 3 $91,00 17.30 Date BETREE So. 00 S96.50 991,80 Unicou 1-Jan 15 S4.000.00 7-Aug 20 SA_600.00 = 11-Dec SS. 100.00 54 Cost of Goods sold AMOUNT QUANTITY $ 34,400 1 Units 37 $ 4.600.00 Total Weighted Average IRATE 54,600.00 Cost of Goods sold 5 70200 Cost of Goodsad FO 2 UFO Weighted average Method $ 147,559 $14.29 $ 148,517