QUESTION 17 Relevant costs and revenues are those that occur in the (a) and (b) between alternatives. Costs that have occurred in the past and cannot be changed are (c) and are called (d). The benefit given up by selecting one alternative over another is aan) lol. 1. future 2. differ 3. irrelevant 4. opportunity cost 5. past -old 6. do not differ le 7. sunk cost 8. relevant