text: //
  //  Bank.h
  //  MoneyTDD
  //
  //  Created by ben on 7/30/13.
  //  Copyright (c) 2013 Fickle Bits. All rights reserved.
  //
  
  #import <Foundation/Foundation.h>
  #import "Expression.h"
  #import "Money.h"
  
  @interface Bank : NSObject
  
  - (void)addRateForCurrency:(NSString *)from to:(NSString *)to rate:(CGFloat)rate;
  - (CGFloat)rateForCurrency:(NSString *)from to:(NSString *)to;
  
  - (Money *)reduce:(id<Expression>)expression toCurrency:(NSString *)currency;
  
  @end
  