Use Case : A super market would record the sales in a file . Whenever an item is sold , the name of item , number of units of sale and cost of each unit in a comma separated format. A sample file would look like below Apple,10,10 Mango,20,5 Guava,10,3 Banana,30,4 Apple,10,5 At the end of the day we are required to find the total sales per each item. Expected Output : Apple 150 Mango 100 Guava 30 Banana 120 Input file : Download the input file from the below location https://github.com/nachiketagudi/Map-Reduce/blob/master/SampleInput.txt place this file at /home/cloudera Map Reduce Executable File : Download the java file from the below location https://github.com/nachiketagudi/Map-Reduce/blob/master/SalesPerItem.java In the Cloudera VM Open eclipse and create a new java project and name it MapReducePractice. Create a new java class and name it SalesPerItem.java and the package name "com.nachiketa.mapreduce.example". After creating the f...