Referring to the diagram below, the project's present worth is most sensitive to which of the variables listed? - Sales price Units sold NPV of a project $450,000 $400,000 $350,000 $300,000 $250,000 $200,000 $150,000 $100,000 $50,000 Fixed costs Variable costs 15% -$50,000 % change in input variable Select one: 0 a. sales price O e b. fixed costs c. variable costs d. units sold