if you sign up with Paypal in Argentina,your local currency is ARGENTINA PESO. You can accept foreign currency and keep them as foreign currency in your Paypal account. you or your buyer can go to PAYPAL terms of agreement,there are some information on person to person payment for differen countries using paypal fund/bank fund OR credit/debit card and you can review your payment receiving preference in your profile under selling tool. I dont know what is meant by primary currency,as your local currency is always the currency of that country you sign up with Paypal.
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