Katie Francis asks everyone she meets to buy a box of Girl Scout cookies. She says that's one of the keys to her cookie-selling success.

The Oklahoma 12-year-old set a new national cookie-selling record on March 23 with 18,107 boxes.

Since then, she's decided to aim for 20,000 boxes by March 30, when the selling period ends. She hopes to sell 100,000 boxes during her overall Girl Scout career.

"She's such a go-getter," Katie’s mom, DeLee Francis, told USA Today. "She works countless hours."

Katie has held the state record for Girl Scout cookie sales since 2012.

A typical day for her during cookie season involves selling boxes after school until about 9:30 p.m. on weeknights. She also puts in 12 to 13 hours of sales time during weekends.

"Cookie selling is a lot of fun and I really enjoy doing it," she said.

The previous national cookie sales record was held by Elizabeth Brinton, who sold 18,000 boxes of Girl Scout cookies in the 1980s. She sold 100,000 boxes during her time as a Girl Scout.

Jaimie Siegal, director of marketing and communications at Girl Scouts of Western Oklahoma, told ABC News that the organization will wait until the selling period is over before commenting on Francis' success.

Related on MNN: