On January $2,2021,$ Archer Company, a skateboard manufacturer, installed a computerized machine in its factory at a cost of $$176,600$ The machine's useful life was estimated at four years or a total of $190,000$ units with a $$36,000$ trade$-$in value. Archer Company's yearend is December $31.$

Calculate depreciation for each year of the machine's estimated useful life under each of the following methods: $($Do not round intermediate calculations.$)$

a$.$ Straight$-$line

b$.$ Double$-$declining$-$balance

c$.$ Units$-$of$-$production, assuming actual units produced were:

$\backslash$table$[[$Year$,2021,2022,2023,2024],[$Units$,40,000,43,700,54,300,73,000]]$

$\backslash$table$[[$Year$,$Straight$-$Line,Double$-$Declining$-$Balance Units$-$of$-$Production,$],[2021,,,],[2022,,,],[2023,,,],[2024,,,],[$Total$,,,]]$