To use the algorithm of exploitation HUI had in case of profit changes, we apply the techniques of direct extraction of useful value of item on each transaction to convert the data from the form is presented in table 2 to form a more compact (only 3 first column) using the formula (i u , T) (in definition 3) replaces the value multiples of useful item by its utility value. Table 3 is the result of table 2 after applying the formula.
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