The Memorial Union has a ramp connected to the building on the East side.
There is metered parking available on the West side of the building (directly outside of the Memorial Union) or on the street on Lincoln Way.
The M-Shop is considered on the Basement level of the Memorial Union. If you park in the ramp, you will cross the building on the first floor and go down a few steps to the M-Shop.
There is also an entrance on the West side of the Memorial Union that does not require steps.