bugfix + betty screenshots

README.md

@@ -41,6 +41,9 @@ inaccuracies or bugs (please report!)
 - Simulating account balance with day granularity
 - Plotting results using PyPlot
 
+![betty1](betty_graph.png)
+![betty2](betty_txt.png)
+
 ## Dependencies
 
 The script uses NumPy, MatPlotLib and Pandas for plotting. This may be improved in a future version

profin/__init__.py

@@ -257,7 +257,7 @@ class MonthlyIncome(AIncome):
                             self.ended = True
                             topay = self.remains
                             self.remains = 0
-                            return topay
+                            return topay if self.monthly > 0 else -topay
                         self.remains -= abs(self.monthly)
                     else:
                         return 0