$[$The following information applies to the questions displayed below.$]$Hemming Company reported the following current$-$year purchases and sales for Its only productDateJanuary $1$January $10$March $14$March $15$July $30$October$5$October $26$ActivitiesBeginning inventorySalesPurchaseSalesPurchaseSalesPurchaseUnits Acquired at Cost$290$ units@$$13\mathrm{.}60$$ $3,944500$ units@ $$18\mathrm{.}609,300490$ units@$$23\mathrm{.}6011,564$Totals$190$ units$1,470$ units@$$28\mathrm{.}605434$$ $30.247$Units Sold at Retail$260$ units$-$a $$43\mathrm{.}60430$ unitsQ$$43\mathrm{.}60470$ units@$$43\mathrm{.}601,160$ unitsEnding inventory consists of $40$ units from the March $14$ purchase, $80$ units from the July $30$ purchase, and all $190$ units from theOctober $26$ purchase. Using the specific Identification method, calculate the following.a$)$ Cost of Goods Sold using Specific IdentificationAvailable for SaleCost of Goods SoldEnding InventoryDateActivity# of unitsCost PerUnit# of unitssoldCost PerUnitCost ofGoods SoldEndingInventoryUnitsCost Per UnitEnding InventoryCostJanuary $1$Beginning Inventory$29013\mathrm{.}60513\mathrm{.}60$$March $14$Purchase$5005000490-00055513\mathrm{.}60$S$000$July $30$PurchaseOctober $26$Purchase$1190$$S$0000\mathrm{.}000\mathrm{.}001,470$$b$)$ Gross Margin using Specific Identification