Um Good, Inc., a candy maker, is thinking of purchasing a new machine. A mar keting firm has estimated that the new machine could increase revenues by $\$ 30) .(\times 6)$ a year for the next 5 years. The expenses directly relating to the machine total $\$ 60,000$ ( $\$ 12,000 \times 5$ years). The initial purchase cost would be $\$ 80,(0)(0)$. What is the unadjusted rate of return?