Where identical quantities of stock or securities are sold and replaced in a wash sale, there is little problem in applying the rules discussed in the prior section.  However, where unequal quantities are sold and replaced or where sales and/or replacements are made in multiple lots (or transactions), the stock or securities sold and the replacement stock or securities must be matched on a chronological basis (beginning with the earliest loss and earliest replacement) before the rules can be properly applied.  (IRC Secs. 1091(b) and (c); Reg. Sec. 1.1091-1)