Get Cart in store main currency without changing user selected currency in frontend.

[devnip]

In my api I need to send cart in store main currency from cart page.
So I make call like below
`/cart.json?currency=AUD`
Here AUD is store main currency.
Now what happen after this ajax call user selected currency is change to AUD.
I can stop that with make ajax call again with 
`/cart.json?currency=${window.Shopify.currency.active}`
but cart can change many time it is not proper solution 

So any help regrading get cart in main currency without change user selected currency would be great.

I'll also try to convert cart in main currency manually via js but not getting exactly same value as don't know exact conversion api rules.

The main goal I try to achieve get cart in store main currency on cart page.

[Small_Task_Help]

Hi,

Need to check your backend if you want you can contact us.

[devnip]

Well issue is related to frontend so I don't think we need access of backend
If you can provide any solution for frontend then it would be great