OpenCart Paypal Issue with LKR

I'm using opencart 1.5.6.4 and using LKR (Sri Lanka Rupee) as default currency. I have followed this thread and enable paypal checkout with LKR currency.

But when i click Confirm Order and redirect to paypal page to pay, papal page display USD amount without convert LKR amount to USD. For example, when i have to checkout LKR 105.00 item, paypal page display it as $ 105.00. But it should display as approximately $ 0.80 (with current LKR to USD conversion).

Opencart shopping cart total.

http://i.stack.imgur.com/lN1Bq.png

Paypal order summary display as below.

http://i.stack.imgur.com/AvIid.png

How can i solve this ?

I am also looking the solution. This is 2021 now.

Have you got LKR added to your Paypal account?