Please complete question (b). I would like to double-check my answer.

In 20X1, the Jaster Company had a break-even point of $720,000 based on a selling price of $12 per unit and fixed costs of $180,000. In 20X2, the selling price and variable costs per unit did not change, but the break-even point increased to $840,000. Required (a) Compute the variable cost per unit and the contribution margin ratio for 20X1. (b) Using the contribution margin ratio, compute the increase in fixed costs for 20X2