Facture & Sales Order (Quotation)

I would like to achive currency symbol to show:

Current:

P.U. HT: 1000.00
Total HT : 1000.00
Total IVA 12%: 1200.00
Total TTC : 1200,00

To:

P.U. HT: $ 1000.00
Total HT : $ 1000.00
Total IVA 12%: $ 1200.00
Total TTC : $ 1200,00

Can somebody please help?

Thanks