The first one, I am unsure, and the second one, I'm unsure if my answer is correct or not..

analysis is used while selecting the mix of products to sell. Oa. Discounted Ob. Activity-based Oc. Receivables Od. Cost-volume-profit indicates the percentage of each sales dollar available to cover fixed costs and to provide operating The income. Oa. volume ratio Ob. fixed cost ratio Oc. contribution margin ratio Od. operating ratio