Purchase on quotation or invoice?

Rhino Rhino for Windows
1

Hi

Am going to buy rhino3d, should we pay on quotation? We thought it should be a proper invoice.

2

@Cheerygirl
https://www.rhino3d.com/sales/north-america/United_States
Questions about purchase:
sales@mcneel.com

moved to Rhino for Windows

3

Thanks!