More than the 48 hours you are legally allowed to do. Type ''maximum weekly hours'' into google and you'll see Euro Car Parts have been braking the laws, openly, for years.
That would usually be left to the Regional Managers discretion. But generally speaking no. The sales jobs are full time Mon-Fri 0800-1800 with 0800-1600 alternate Saturdays. You are NOT allowed to take a Saturday off if you are due to work you must swap it with a colleague.