LANSING, Mich. (AP) — A 50-year-old supervisor at a Michigan fiberglass factory is the winner of a $310.5 million Powerball jackpot.

Julie Leach of Three Rivers says she was having a “bad night” at her third-shift job when she took a lunch break. She checked the numbers while waiting in a McDonald’s drive-thru.

Leach says she is in “disbelief.” She quickly quit her “nasty, dirty” job and plans to build houses in Michigan for her and her partner of 36 years, their three children and 11 grandchildren.

Leach chose a lump sum of $197.4 million, or $140 million after taxes. It’s Michigan’s second-largest lottery prize.