Specific application development
I want to build specific applications for Facebook, and construction of the application shows a lot of money.
Therefore, I would like to contact Facebook before I start to develop it.
How do I do this?
Another question,
Is there a problem selling items on Facebook? (By credit card). For example, there is a shoe company and I want to sell her items on Facebook? Or I could just turn from application to another page where he will continue to carry out the buying?

Thanks for your help.
I can not find the help that Facebook's policies.
Thank you and good day.
Specific application development
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I want to build specific applications for Facebook, and construction of the application shows a lot of money.
Therefore, I would like to contact Facebook before I start to develop it.
How do I do this?
Another question,
Is there a problem selling items on Facebook? (By credit card). For example, there is a shoe company and I want to sell her items on Facebook? Or I could just turn from application to another page where he will continue to carry out the buying?

Thanks for your help.
I can not find the help that Facebook's policies.
Thank you and good day.