I am a cashier today i had a customer come in and say that they have been in the hospital with mrsa on leg what are my chances of getting it any help

No worries: For every person with a diagnosed MRSA infection, probably 100 others are carriers. At a busy cash register, probably several customers each day carry staph, often MRSA. The person diagnosed with an active MRSA infection is no more risk to you than all the others. Just use common sense hygiene, like frequent hand washing or alcohol gel. (You're at much higher risk of colds or flu than MRSA.)