I

Required information

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Jorgansen Lighting, Incorporated, manufactures heavy$-$duty street lighting systems for municipalities. The company uses variable costing for internal management reports and absorption costing for external reports. The company provided the following data:

$\backslash$table$[[,$Year $1,$Year $2,$Year $3],[$Inventories$,,,],[$Beginning $($units$),210,170,190],[$Ending $($units$),170,190,230],[$Variable costing net operating income,$$300,000,$$$279,000,$$$260,000$