title: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSDecimalNumber length]:
body: <p>With these lines of code:</p>
  
  <pre><code>PayPalPayment *payment = [[PayPalPayment alloc] init];
  NSLog(@"Price %@",[self.product objectForKey:@"Price"]);
  NSString *string = [self.product objectForKey:@"Price"];
  payment.amount = [[NSDecimalNumber alloc] initWithString:string];
  </code></pre>
  
  <p>my app is crashing with this log:</p>
  
  <pre><code>[NSDecimalNumber length]: unrecognized selector sent to instance
  </code></pre>
  
  <p>The NSLog is returning:</p>
  
  <pre><code>Price 96.67
  </code></pre>
  
  <p>Whay is it crashing???</p>