Bankstown Ltd has three product lines A , B and C. The contribution margins of the products are $3, $2 and $1 respectively. Michael Gallagher, the marketing manager forecasts sales of 200000 units in the coming period consisting of 20000 units of A , 100000 units of B and 80000 units of C. The company fixed costs for the period are $ 255000. Required: A) calculate the break even point in units using the given sales mix. B) calculate the break even point in units using the given sales mix with the excepted profits after tax is $30600 and the tax rate is 40%. C) using the original data calculate the total contribution margin and the profit using the given sales mix for the total sales of 200000 units