Bill plans to open a do-it-yourself dog bathing center in a store front. the bathing equipment will costs $50,000. Bill expect the after tax cash inflows to be 15,000 annually for 8 years, after which he plans to scrap the wuient and retire to the beaches of Jamaica. 

A. what is the project pay back period. 

B. Assume the required return is 10%. what is the project's NPV? 

c. Assume the required return is 20%. what is the project's PI? should it be accepted?