Stuck / Need help on my study guide. Thank you

1) On January 1, 2016, Company X buys a one-year insurance policy for $1200. What is the adjusting Journal Entry to be completed January 31, 2016? Debit: insurance expense $100 Credit: prepaid insurance $100 2) For the same company in question #1, what is the monthly adjusting Journal Entry November 30, 2016? Is it the same as the JE on Jan 31, 2016? Why or why not? Same, because it is considered a monthly prepaid expense 3) On January 1, 2016, Company Y borrows $1000 for one year at 12% interest. What is the adjusting Journal Entry January 31, 2016? Debit: Cash $1000 Credit: Note payable $1000 4) For the same company in question #3, what is the monthly adjusting Journal Entry December 31, 2016? Is it the same as the JE on January 31, 2016? Why or why not? Debit: interest expense 120 Debit: Note payable 1000 Credit: Cash 1120 5) On Jan 2 Company Z buys 50 widgets for $25 each 1/10 n 30 on account. $12.50 6) Shipping on the purchase is $245 FOB shipping. Debit: Freight-in $245 Credit: Cash $245 7) Jan 5 Company Z returns 1 widget for credit. Debit: Notes receivable $25 Credit: 8) On Feb 1, the company sells 10 widgets for $50/each 2/10 n 30 on account. Assume COGS is $30/widget. Debit: Inventory $490 Credit: Account receivable $490 9) The customer who bought the widgets from Company Z returns two of them for credit. 10) On Feb 11 the customer pays Company Z. 11) What are all of the factors that can increase or decrease Cost of Goods available for sale? 12) What is the formula to calculate Cost of Goods Sold under a periodic inventory system? 13) What is the basic adjusting entry for each of four adjustment types Prepaid Expense, Unearned Revenue, Accrued Expense and Accrued Revenue? How are account balances under or overstated before adjustment for each of these four types? 14) What is the purpose of performing an Adjusted Trial Balance? 15) What is the difference between a Periodic Inventory System and a Perpetual? 16) Which Accounts are closed at the end of an accounting period? 17) What is the purpose of a Worksheet? 18) Why is a Post-Closing Trial Balance performed? 19) What Journal Entry would be made if our computer records showed Inventory balance $1000 but our physical count confirmed there is $900? 20) If last period's Salaries & Wages Payable was $1000, this period's Salaries & Wages Expense $5000 and this period's Salaries & Wages Payable is $500, how much was paid this period for Salaries and Wages? $6500