Exercise $6-2($Algo$)$ Variable Costing Income Statement; Explanation of Difference in Net Operating Income $[$LO$6-2]$

Ida Company produces a handcrafted musical instrument called a gamelan that is similar to a xylophone. The gamelans are sold for $$910.$ Selected data for the company's operations last year follow:

$\backslash$table$[[$Units in beginning inventory,$0],[$Units produced,$300],[$Units sold,$270],[$Units in ending inventory,$30],[$Variable costs per unit:,$140],[$Direct materials,$$350$