Please include all equations!

Kottinger's Kamp Supplies is considering an investment in new manufacturing equipment. The equipment costs $220,000 and will provide annual aftertax inflows of $50,000 at the end of each of the next 7 years. The firm's market value debt/equity ratio is 25%, its cost of equity is 14%, and its pretax cost of debt is 7%. The firm's combined marginal federal and state tax rate is 40%. Assume the project is of approximately the same risk as the firm's existing operations. What is Kottinger's weighted average cost of capital? A) 8.91% B) 9.99% C) 10.86% D) 11.14% E) 12.04% What is the NPV of the proposed project? A) $6,297 B) $7,899 C) $9,156 D) $13,436 E) $15,984