mountain frost is considering a new project with an initial cost of $210,000. the equipment will be depreciated on a straight-line basis to a zero book value over the four-year life of the project. the projected net income for each year is $20,100, $21,000, $24,600, and $17,000, respectively. what is the average accounting return? multiple choice 21.10% 9.85% 14.77% 19.69% 18.05%