Katie Francis of Oklahoma City sold 18,107 boxes in the seven-week sales period that ended Sunday night. The previous mark was set by Elizabeth Brinton, who sold approximately 18,000 one year in the 1980s.
The sixth-grade student told The Oklahoman newspaper last month that there were only three ingredients needed to rack up large sales: a lot of time, a lot of commitment and asking everyone she met to buy.
Katie sold 12,428 boxes last year.
Read more: http://www.nbcnews.com/news/us-news/oklahoma-girl-breaks-girl-scout-cookie-sales-mark-n61296
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