Possibility of billing on the site (on bitrix)

Employer
[no-member:pro]Elvina[/no-member:pro]Elvina
Project parameters
Type of cooperationOne-time project
SectionWeb development
Prepaymentwithout prepayment
Payment methodsElectronic money
Acceptance of requestsclosed
Project description
Good afternoon. The site works on a bitrix, it is required to create a form, when filling out which an invoice is created for payment to the buyer in exel format, opens in the adjacent window and is sent to the user by mail.