Final Answer:
Considering an annual 10% interest rate and an annual cash flow analysis, the net present value (NPV) of the process using the specialized firm, Hydro-Clean, offering $225,000 per year for 15 years equates to approximately $730,370. This offer from Hydro-Clean should be accepted over the in-house treatment process.
Step-by-step explanation:
To determine the better option, the net present value (NPV) of each alternative must be calculated. For the in-house treatment, the initial cost is $450,000, and the cost declines by $43,000 annually. Using the formula for the NPV with a 10% interest rate over 15 years, the NPV for the in-house treatment is approximately $367,309.
For Hydro-Clean's offer of $225,000 annually for 15 years, the NPV is calculated considering the annual cash flows and the 10% interest rate. The NPV for Hydro-Clean's offer stands at around $730,370. Comparing the NPVs, Hydro-Clean's offer yields a higher NPV, indicating a more financially beneficial option. Therefore, the recommendation is to accept Hydro-Clean's offer over implementing the in-house waste treatment process, as it generates a higher NPV and represents a more cost-effective choice over the 15-year period.