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George buys his lunch from a convenience store each day, but he finds he’s constantly left with small change that he never uses or simply loses. George wants to optimise his purchase such that he spends a whole $10 note every time he visits the store.
Define the term algorithm
PRICES is a one-dimensional array of length 30 with the price of a product at each index, such that PRICES[0] = 3.25 for example.
Write an algorithm using PRICES that outputs the index of each pair of different items with prices that add up to exactly $10
George is very impressed with his algorithm and decides to integrate it into a program and publish it for free online.
State why user documentation might be necessary to include with the program
Suggest two ways user documentation could be provided

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