milly buys a house on 5/10/2017 for 300,000. she starts paying a monthly maintence fee of $500 on the first of every month starting on 6/1/2017. she sold the place on 7/3/2017 for $400,000. what is her inital rate of return on the house?

step hy step calculations.

she pays matience when she buys the house. then she sells it after for the sold price.