A change in interest payable

Question $34($Mandatory$)(2\mathrm{.}5$ points$)$

Which of the following is $($are$)$ the proper time period$($s$)$ to record the effects of a change in accounting estimate?

$$ Current period and retrospectively

Retrospectively only

Current period and prospectively

Current period only

Question $35($Mandatory$)(2\mathrm{.}5$ points$)$

$$ Saved

Knapp Corporation acquired machinery at a cost of $$1,2$

p Corporation of depreciation for this