When I am trying to checkout I am getting this error:
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Hi Pratic,
Are you ordering a sample?
If yes, please refer to 
A gmail id is not accepted.
Thanks for your help.........So there might be an issue that with my gmail account I actually have access to the sample program that's why I was confused. Thanks.
Hi Pratic,
Sorry for the delayed response.
I am not sure what you mean by you have access to the sample program.
Additional information about using a free email domain to order samples can be found here: