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Berkner Company uses standard costing. Tim Kerwin, the new president of Berkner Company, is presented with the following data for $2020$:

$($Click the icon to view the data.$)$

Read the requirements.

Data table

$\backslash$begin$\{$tabular$\}\{|$c$|$c$|$c$|$c$|\}$

$\backslash$hline & A & B & C $\backslash \backslash$

$\backslash$hline $1$ & $\backslash$multicolumn$\{3\}\{|$l$|\}\{$Berkner Company$\}\backslash \backslash$

$\backslash$hline $2$ & $\backslash$multicolumn$\{3\}\{|$l$|\}\{$Income Statements for the Year Ended December $31,2020\}\backslash \backslash$

$\backslash$hline $3$ & & $\backslash$begin$\{$tabular$\}\{$l$\}$

Variable $\backslash \backslash$

Costing

$\backslash$end$\{$tabular$\}$ & Absorption Costing $\backslash \backslash$

$\backslash$hline $4$ & Revenues & $\backslash$$ $8,850,000$ & $\backslash$$ $8,850,000\backslash \backslash$

$\backslash$hline $5$ & Cost of goods sold $($at standard costs$)$ & $\backslash (4,670,000\backslash )$ & $\backslash (5,845,000\backslash )\backslash \backslash$

$\backslash$hline $6$ & Fixed manufacturing overhead $($budgeted$)$ & $\backslash (1,500,000\backslash )$ & $0\backslash \backslash$

$\backslash$hline $7$ & Fixed manufacturing overhead variances $($all unfavorable$)$: & & $\backslash \backslash$

$\backslash$hline $8$ & Spending & $75,000$ & $75,000\backslash \backslash$

$\backslash$hline $9$ & Production volume & $0$ & $390,000\backslash \backslash$

$\backslash$hline $10$ & Total marketing and administrative costs $($all fixed$)$ & $\backslash (1,535,000\backslash )$ & $\backslash (1,535,000\backslash )\backslash \backslash$

$\backslash$hline $11$ & Total costs & $7,780,000$ & $7,845,000\backslash \backslash$

$\backslash$hline $12$ & Operating income & $\backslash$$ $1,070,000$ & $\backslash$$ $\backslash (1,005,000\backslash )\backslash \backslash$

$\backslash$hline $13$ & Inventories $($at standard costs$)$ & & $\backslash \backslash$

$\backslash$hline $14$ & December $31,2019$ & $\backslash$$ $1,490,000$ & $\backslash$$ $1,695,000\backslash \backslash$

$\backslash$hline $15$ & December $31,2020$ & $80,000$ & $220,000\backslash \backslash$

$\backslash$hline

$\backslash$end$\{$tabular$\}$

Requirements

$1.$ At what percentage of denominator level was the plant operating during $2020?$

$2.$ How much fixed manufacturing overhead was included in the $2019$ and the $2020$ ending inventory under absorption costing?

$3.$ Reconcile and explain the difference in $2020$ operating incomes under variable and absorption costing.

$4.$ Tim Kerwin is concerned: He notes that despite an increase in sales over $2019,2020$ operating income has actually declined under absorption costing. Explain how this occurred.