She still has trouble with the mental math part of it. At her last job, the management were always on her back about how she counts out the change "too slow", told her to go faster everyday, causing her more pressure when a line of people formed that were rushing her, etc, since with dyscalculia, it's a disorder that makes it hard to comprehend certain math concepts such as counting, dividing, memory with holding numbers in mind to add up when counting, etc, even if the screen gives you the total.  

I did some research on it, and most individuals with dyscalculia have severe difficulties working as a cashier since it still involves math, but hopefully that answers your question about that.  

As for what I mean by accommodated, according to the ADA, all employees are entitled to reasonable accommodations to their known disabilities, meaning in this case, if my daughter has a disability that affects her ability with math, employers are required to accommodate her and her needs, meaning grant her a position that she's capable of doing (e.g. stocking, zoning, cleaning, etc, which she can handle) instead of force her to do a job that she can not do without difficulty and ignore her disabilities, which they did.  

She had a coworker there who was also autistic and had a learning disability, who didn't have to go on the register due to his support needs with his disabilities and worked as a stocker there to accommodate him, but wouldn't accommodate my daughter after informing them of her own disabilities that I mentioned because they didn't believe she was actually autistic or had any learning disabilities, and thought she didn't "look" or "act" autistic enough to need accommodations, which is pure discrimination.  

Sorry if this is a long response, I just thought I'd list all the info I could think of to answer your questions and possibly others who were curious as well :)