Identification and Effects of Changes and Errors

The following are independent events:

Required:

Indicate what type of accounting change or error, if any, is represented by each of the preceding items and the method of accounting

$($retrospective adjustment, prospective, or prior period adjustment$)$ for the item in the financial statements of the current year.

a$.$ Changed from the FIFO to the LIFO inventory cost flow assumption.

b$.$ Wrote off patent due to the introduction of a competing product.

c$.$ Changed accounting policy of not accruing interest on notes payable to accruing interest.

d$.$ Increased allowance for uncollectible accounts from $2\%$ to $4\%$ of credit sales.

e$.$ Changed from straight$-$line to double$-$declining$-$balance method.

f$.$ Increased the rate used to compute warranty costs.

g$.$ Purchased another company that requires the presentation of consolidated financial statements in place of unconsolidated financial

statements.