Conversion using Currency

An 0.5-liter bottle of Mexican wine cost 140 pesos.What is the price in dollars per ounce?
Dollars per Foregin Foregin per dollars
British Pound 1.414 0.7072
Canadian dollar 0.7834 1.277
European euro 1.256 0.7965
Japense yen 0.01007 99.34
Mexican Peso 0.06584 15.19

State all of the converions factors that you use.
1= 1000ml /1L 1= 1L/1000mL

1= 0.03381/1mL 1= 0.06584/1 peso

1= 1mL/0.03381 oz 1= 1peso/0.06584

So confused please help!