Data.currencySymbolPosition.observe(activity, currencyPositionObserver);
Data.currencyGap.observe(activity, currencyGapObserver);
Data.locale.observe(activity, localeObserver);
item.observeCurrency(activity, currencyObserver);
item.getModel().showCurrency.observe(activity, showCurrencyObserver);
Data.currencySymbolPosition.observe(activity, currencyPositionObserver);
Data.currencyGap.observe(activity, currencyGapObserver);
Data.locale.observe(activity, localeObserver);
item.observeCurrency(activity, currencyObserver);
item.getModel().showCurrency.observe(activity, showCurrencyObserver);