Simple starters               Ss

   fahrenheit =. 50       
   (fahrenheit-32)*5%9
10

   prices =. 3 1 4 2
   orders =. 2 0 2 1
   orders * prices
6 0 8 2
   +/orders * prices
16

   +/\ 1 2 3 4 5
1 3 6 10 15

   bump =. +&1    

   prices
3 1 4 2
   bump prices
4 2 5 3
