Assume that Beaver uses the periodic system, and the end of period ending inventory for January is 110 units. a. Prepare all necessary journal entries to record the transactions above including end-of-month closing entry to record cost of goods sold.

Part 1 a

jan 4

Debit ; Accounts Receivable (80 x $8.00) $640

Credit : Revenue $640

jan 11

Debit ; Purchases (150 x $6) $900

Credit : Accounts Payable $900

jan 13

Debit ; Accounts Receivable (120 x $8.75) $1,050

Credit : Revenue $1,050

jan 20

Debit ; Purchases (160 x $7) $1,120

Credit : Accounts Payable $1,120

jan 27

Debit ; Accounts Receivable (100 x $9.00) $900

Credit : Revenue $900

jan 31

Debit ; Cost of Sales (100 x $5 + 150 x $6 + 160 x $7) $2,520

Credit :  Inventory $2,520

Part 1 b

Gross Profit = Sales - Cost of Sales

Sales = ( 80 x $8.00 + 120 x $8.75 + 100 x $9.00) = $2,590

Cost of Sales = (100 x $5 + 150 x $6 + 160 x $7) = $2,520

Therefore,

Gross Profit = $2,590 - $2,520

                   = $70

Part 2 a

jan 4

Debit ; Accounts Receivable (80 x $8.00) $640

Debit : Cost of Sales (80 x $5.00) $400

Credit : Revenue (80 x $8.00)  $640

Credit : Inventory (80 x $5.00) $400

jan 11

Debit ; Purchases (150 x $6) $900

Credit : Accounts Payable $900

jan 13

Debit ; Accounts Receivable (120 x $8.75) $1,050

Debit : Cost of Sales (20 x $5.00 + 100 x $6) $700

Credit : Revenue (120 x $8.75) $1,050

Credit : Inventory (20 x $5.00 + 100 x $6) $700

jan 20

Debit ; Purchases (160 x $7) $1,120

Credit : Accounts Payable $1,120

jan 27

Debit ; Accounts Receivable (100 x $9.00) $900

Debit : Cost of Sales (50 x $6.00 + 50 x $7) $650

Credit : Revenue (100 x $9.00) $900

Credit : Inventory (50 x $6.00 + 50 x $7) $650

Part 2 b

Gross Profit = Sales - Cost of Sales

Sales = ( 80 x $8.00 + 120 x $8.75 + 100 x $9.00) = $2,590

Cost of Sales = ($400 + $700 + $650) = $1,750

Therefore,

Gross Profit = $2,590 - $1,750

                   = $840

Explanation:

Hie, see the attached the full question as images below

Part 1

Note that the question in this part requires us to use the Periodic Inventory System. In Periodic Inventory system, Inventory Valuation and calculation of Cost of Goods Sold is done at the end of the Period, in this case at the end of the month of January.

Part 2

Again it is important to note that the question in this part requires us to use the Perpetual Inventory System. In Perpetual Inventory system, Inventory Valuation and calculation of Cost of Goods Sold is done at the after each and every transaction made.

Overall Comment

The Company use of FIFO should be considered in both the Periodic Inventory System in Part 1 and Perpetual Inventory System in Part 2. FIFO method assumes that the first goods received by the business will be the first ones to be delivered to the final customer.

That said, Cost of Sales for Part 1 are determined and recognized at the end of the period and Cost of Sales for Part 2 are determined and recognized after every sale transaction made

and whats your questoin

b. take periodic breaks and alternate between tasks.  

will increase work efficiency, and avoid health issues.