Lindstrom Company produces two fountain pen models. Information about its products follows:

Lindstom's fixed costs total $$80,500$

Required:

$1-$ Determine Lindstrom's weighted average unit contribution margin and weighted average contribution margin ratio.

$2-$ Calculate Lindstrom's breakeven point in units and in sales revenue.

$3-$ Calculate the number of units that Lindstrom muscle to earn a $$150,000$ profit.

$4-$ Calculate Lindstrom's margin of safety $($in units and sales dollar$)$ and margin of safety as a percentage of sales based on the sales data provided in the table above.