Answers

2014-12-03T20:20:01+05:30
Price of item he bought=3.85+8.75+16.65+18.5=47.75

He gets back Rs=100-47.75= 52.25
0
2014-12-03T20:33:16+05:30

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Addition of prices of items purchased:

  2  2    1
=========
     3 .  8  5
     8 .  7  5
  1 6  . 6  5
  1 8 .  5 0
========
  4 7 .  7 5        --  this is the total cost of items purchased.
=========

     calculation of money to get back  - by subtraction

                          -1 -1 -1  -1
                       ===========
Money  given  ==  1  0  0 . 0  0
cost                        4  7 . 7  5
                           ==============
  balance            0  5  2  . 2  5


1 5 1