If a manufacturer of electronic devices invests $$600,000$ in equipment for making compact piezoelectric accelerometers for general purpose vibration measurement, estimate the rate of return from revenue of $$220,000$ per year for $10$ years and $$60,000$ in salvage value from the used equipment sale in year $10.$

The rate of return is$\_\_\_\_\_\%.$

$285\mathrm{.}625\%$ is incorrect.