This is my Study guide and it would be really helpful to get some explanation and answers for these questions.

. . . Classified Balance Sheet What accounts are Included in Current Assets and Current Liabilities as well as other classified balance sheet assets, liabilities, and SH equity Adjusting Entries Accrual of Interest expense for a note payable at December 31 Journal entry when the note payable and interest is paid in the following year, Prepaid Insurance Revenues received in advance of when the services are performed Salaries earned but not paid by December 31 Office suppiles purchased and used Closing entries - types of accounts that are closed each year Inventory Costing Methods Calculation of Ending Inventory and COGS for FIFO, UFO, and weighted average effect of Inventory error on gross profit, such as If Ending Inventory is understated in year 1, what is the effect on gross profit in year 1 and year 2 the error is not detected Recordique Sales Revenue and cost of Goods Sold Perpetual Method . Journal entries for sales revenue and cost of goods sold under the perpetual Inventory method Bad Debts Expense and Allowance for Doubtful Accounts Allowance for doubtful accounts is a contra account - what does this mean? Adjusting entry for Bad Debts Expense at December 31 under the allowance method How are accounts receivable written off? Depreciation Expense Calculation of depreciation expense In Year 1 and Year 2 using the straight-line method, the declining balance method, and the units of activity method Computing depreciation when the depreciation assumptions are revised, such as the useful life is changed or the salvage value Computing sain or loss on the sale of a building or equipment Basics of Double Entry Bookkeeping Effect of transactions on accounts, Increase or decrease Normal balances of accounts Debits and credits - Increases or decreases to which accounts? Bonds Payable Why are bonds sold (issued) at a discount or premium? MR vs CR Calculation of interest expense on bonds, i.e., carrying valuex MR Journal entry for the issuance of bonds, payment of Interest, and amortization of discount or premium What does a discount on bonds payable mean? Amortization increases the contractual interest rate to the market rate. Stockholders' Equity Journal entry for issuance of common stock Purchase of treasury stock and classification on the balance sheet Declaration and payment of cash dividends Declaration and issuance of stock dividends Accounting treatment for stock splits