Suppose Shaan invested just $14,000 of his own money and had a $93,000 mortgage with an interest rate of 8.5 percent. After three years, he sold the property for $125,000. (a) What is his gross profit? Gross profit $ 18,000 (b) What is his net profit or loss? (Input the amount as a positive value.) Net loss (c) What is the rate of return on investment? (Negative amount should be indicated by a minus sign. Enter your answer as a percent rounded to 1 decimal place.) Percent return on investment %