This screen shot comes from ” codeacdemy’s tip calculator tutorial “. basically  we were suppose to apply the tip to the overall cost of the meal. The cost of the meal was 44.50 , the restaurant tax 6.75% and tip  15%. the actual task was to find out the the overall bill , this had to be done in python, meal = meal + meal * tax and afterwards total = meal + meal * tip . The bill came out to be 54.63 in total , after taxs and tips .