You are the business analyst for your organization. You're considering if you should make a solution or purchase it from a vendor. If your team creates the solution, it will cost $286,000 and will cost $2,400 per month to support. The vendor's solution, however, will cost $239,000 and will cost $2,850 per month to support. How long will you need to use your in-house solution to be more cost effective than the vendor's proposed solution?