Prepare a contribution margin (behavioral, variable) income statement for Lewis Company, compare net operating profit from a contribution margin income statement with net income from an absorption income statement, and explain why this difference happens. Prepare a second version assuming the selling price per unit increases to $320 per unit.
Further, answer break even questions below. Use the original information to:

Determine the number of units the company must sell to break even for the year?
Compute break even assuming direct materials cost increase from $120 to $150, but all information remains the same.