Hi expert, please assist me with this question.

Current Attempt in Progress Lancer Audio produces a high-end AV receiver that sells for $1,300. Total operating expenses for the past 12 months are as follows: Use the high-low method to estimate fixed and variable costs. eTextbook and Media Based on these estimates, calculate the break-even level of sales in units. (Round answer to whole units, e.g. 15. Use contribution margin per unit to calculate the answer.) eTextbook and Media Calculate the margin of safety for the coming August assuming estimated sales of 175 units. Margin of safety eTextbook and Media Estimate total profit assuming production and sales of 175 units, (Use contribution margin per unit to calculate the answer.)