Hemming Company reported the following current$-$year purchases and sales for its only product.

Ending inventory consists of $45$ units from the March $14$ purchase, $75$ units from the July $30$ purchase, and all $100$ units from the

October $26$ purchase. Using the specific Identification method, calculate the following.

Answer is complete but not entirely correct.

a$)$ Cost of Goods Sold using Specific Identification

b$)$ Gross Margin using Specific Identification