Your company has just purchased a new 3D printer for $27,000. The printer is expected to have a negligible salvage value at the end of its useful life (10 years). However, it is expected to generate $8,000 in revenue for your company annually and will require $1,500 per year in operating and maintenance expenses. If your firms MARR is 15%, how many years will it take your company to recover its investment (i.e. how long will it take your firm to break even)?