No
No, use different currencys but it is slightly cheaper in Brazil. Does this help?
Gross price-expenses=net price
The formula is Gross = Net * ( Tax rate / 100 + 1) You can also use this site to calculate Gross/Net Price. http://jumk.de/bank-formulas/gross-net.shtml
no discounted price is the price after some money has been taken off the sale price for a sale etc. but sale price is the original price