If an individual sells, exchanges, or replaces a resource, what is received in return
                  is not income. It is a different form of resource. This includes assets which have
                  never been subject to resources counting because the owner sold, exchanged, or replaced
                  them in the same month in which received them.
               
               SI 00830.510 contains instructions on the income/resources treatment of proceeds received for
                  timber, gravel, and other natural resources.