I see said the 'deaf' girl

I feel bad about titling anything with a handicap reference but once you read you will understand my sarcasm.
Once (okay, perhaps twice) a week I will treat myself to a small soda.
I have been going to Arby's (free plug). We just got one put in !
Anyways, this is the same script each and every time I pull up:

' can I help you '
' yes, I just need one small pepsi please, and that is it '
' one small pepsi, will that be all ? '
(short pause on my behalf)
' yes, that is it '
'thank you, please drive up '

A few days later, same drive up:
' can I help you '
' yes, I just need one small pepsi please, and that IS all '
' one small pepsi, will that be all ? '
(much longer pause on my behalf)
' yes, that IS it '
'thank you, please drive up '

Later that week:
' can I help you '
' yes, just one small pepsi'
' one small pepsi, will that be all ? '

(OH GOOD GRIEF LADY)

Now, at this point I am staring straight ahead, shaking my head in utter confusion for her. Was there an echo contest going on I did not know about? Do people just not care to listen to the simplest of things anymore.

I purposely pause for a good 10 seconds thinking perhaps this will teach her to think before mindlessly repeating the obvious.
' yep ', I reply.

I think my next visit to that drive up I will change my order to,
' one Frosty please ' .