WEIGHTED AVERAGE: August $1$ had beginning $2,800$ units cost $\backslash (5\mathrm{.}70\backslash$$ $\backslash )$ each August $8$ Purchase $11,200$ units for $5\mathrm{.}90\backslash$$ each August $14$ sold $8,400$ units for $\backslash (12\mathrm{.}40\backslash$$ $\backslash )$ each August $18$ purchase $8,400$ units for $\backslash (6\backslash$$ $\backslash )$ each August $25$ sold $9,800$ units for $\backslash (11\mathrm{.}40\backslash$$ $\backslash )$ each August $28$ purchase $5,600$ units for $6\mathrm{.}20\backslash$$ each August $31$ inventory end $9,800$ units $1.$Using Weighted$-$average inventory method under a perpetual systems what is the cost of goods sold and cost of ending inventory? $2.$Using Weighted$-$average inventory method under a periodic systems what is the cost of goods sold and cost of ending inventory?