At the beginning of the year, Grillo Industries bought three used machines. The machines immediately were overhauled, were installed, and started operating. Because the machines were different, each was recorded separately in the accounts. Details for Machine A are provided below.

$1.$Compute year $2$ straight$-$line depreciation expense for Machine A$,$ assuming an estimated life of four years and $$1,000$ residual value.

$2.$ Give the journal entry to record year $2$ depreciation expense for Machine A$.$

$3.$ Compute year $2$ units$-$of$-$production depreciation expense for Machine B$,$ assuming a capitalized cost of $$42,000,$ an estimated life of $30,000$ hours, $$4,500$ residual value, and actual year $2$ use of $8,000$ hours.

$4.$Give the journal entry to record year $2$ units$-$of$-$production depreciation expense for Machine B$.$

$5.$Compute years $1$ and $2$ double$-$declining$-$balance depreciation expense for Machine C$,$ which has a cost of $$25,400,$ an estimated life of $10$ years, and $$1,400$ residual value.

$6.$ Give the journal entry to record year $2$ double$-$declining$-$balance depreciation expense for Machine C$.$