I suggest that if you need a fuller answer than what appears below you issue an immediate support request to our Vendor Support through your main Plimus account control panel.
 
I am not clear what currency you are referring to by KSA - but I assume it is Saudi currency.
Customers can be charged and prices cited in Saudi Riyals, and the transaction conducted in this currency. When it comes to making revenue payments from Plimus to your account you will be paid and accounted for by Plimus in US Dollars.
 
I am not certain what you mean by the term 'embed' but the way the system works is that the Plimus platform creates set of sales order page URLs that you link to from your main site and the secure online sales transaction takes place on these pages using the relevant payment methods available to your purchaser.

The initial sale pages template can be designed to fit in with your site design and branding. You just need to request this from Vendor Support and this template design service is free.
 
Hope this helps,
 
Derek, Plimus