When does self-checkout register open and close?

ive been in the tumwater store late nights ,sometimes 2 or 3 a.m and the only isle besides isle 9 (the ciggerette counter)that was opend was the self checkout isle due to the emplyees stocking shelves

7 to 10

Pretty sure its 7 am - 10 pm

Lacey Walmart is usually open whenever I go. But think its 7am to 10pm

7am to 10pm for Chehalis & Tumwater Walmart's.

7 am-10pm