evidence to trace directly the source of the funds used to acquire each item of disputed property to his separate property to overcome the presumption in favor of community property. Husband merely established that at most times under consideration he had sufficient separate funds available to make the purchases of the shares of stock in question. Husband has failed to show that he actually expended said funds for the purchases of the disputed shares of stock. Contrary to the assertion made by husband, the work sheet and testimony of Loney did not show "exactly where the money came from, where it went and how it was disposed of." In preparing the work sheet, Loney looked at husband's position at the end of the year. Loney looked to thethat if husband purchased stock from the account at Union Bank and then *444 sold this particular stock and placed the funds in his account at Great Western, his work sheet would not show that the funds originally were from the account at Union Bank. In other words, husband did not attempt to deposit the proceeds from the sale of stock into the same account from which the funds were obtained to purchase the stock. In 1975, the amount of money expended to purchase stock exceeded the amount of money received from the sale of stock or dividends in the amount of $1,334. In 1976, husband purchased stock in an amount which exceeded the proceeds realized from the sale of stock in that year in the amount of