Answer:
Income Statement - Oak Mart
total sales $320 x 118,000 units sold = $37,760,000
variable COGS ($15,355,000)
variable beginning inventory = ($405,000)
variable direct costs ($40 + $62) x 115,000 = ($11,730,000)
variable overhead = ($3,220,000)
manufacturing margin $22,405,000
variable administrative and selling costs ($1,416,000)
contribution margin $20,989,000
fixed costs ($12,000,000)
fixed overhead = ($7,400,000)
administrative and selling = ($4,600,000)
net income $8,989,000
When you are calculating variable costing, COGS only includes variable costs. All fixed costs are included as period costs at the end. Fixed costs are not carried forward either.