Six months ago, you purchased a tract of land in an area where a new industrial park was rumored to be planned. This land cost you $110,000, and the seller offered you an interest- free loan for 70 percent of the land cost. Today, the industrial park project was formally announced, and an attorney for the developer has just offered you $190,000 for your land. If you accept this offer, what will be your holding period return on this investment?