That's all up to the company they may be able to help you with paying for the class.

Rhonda, reality check!
You've only worked a few months?
Took a week off for vacation. What? And , for these yahoos, suggesting you make it sound job enhancing, Come on! If you like your company, you better get your ducks in a row. Try being there a while see where it will take you. 4 days of computer classe is a debit, job a credit!

That depends on your boss and/or policies in your company. If you worked for me, I'd let you have all the time you want (i.e., you're fired). You don't seem serious about the job they are paying you for.

I have question for you--Was that week off a paid vacation or a time off unpaid? If it wasn't a paid vacation, which I doubt it was, since you have only been at job a few months, then just put in a time off request for those days. If you feel job will look unfavorably on request, offer to cover the weekend shifts. It is possible to work and go to school. You just might not have time for any social activity that particular week. I also get the impression that this particular job is not your end goal job being it is a retail job (not a real job just one that pays the bills}. Utilize the time on this job to learn some work ethics.

Is there any chance you could work the evening shift while taking the classes?

If you can present it as an asset to the company and your currently position, they may take it as a definite asset to you and them. But you have to present it in such a way that it is not perceived as a threat to the move. Play your cards right and be mindful of your presentation,

Hey Rhonda, cool question. If you can show that the computer class could benefit your job role, I think you should absolutely take the information to your employer and let them know you want additional training. Any good employer would definitely be impressed by your initiative.