please help me with the first three questions

The relative distribution of sales among the various products sold by a business is the Ca propenfolie . contribution margin che hof goods d. we me Spice Inc.'s unit selling price is $55, the unit variable costs are $35, fixed couts are $110,000, and current sales are 9,700 units. How much will operating Income change sales increase by 5,500 units? 315,000 de 5. 10400 C5164.000 Increase d. 5110.000 in Which of the following is not an assumption underlying cost-volume-profit analysis? Ca. The sales mix is constant b. The break-even point will be passed during the period. Cc Costs can be accurately divided into fixed and variable components d. Total sales and total costs can be represented by straight lines