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Determine percentages of quantities as specified in the problems below:
a. A product that cost $250 last year has now increased in price by 15%. What is the dollar value of this price increase?
b. The number of sales of a particular item are expected to decrease by 8%. Given that the number of sales was originally 500, how many less sales can be expected?
c. How much commission can a sales rep expect on an item sold for $340, given that the rate of commission is 12.5%?
d. An asset originally worth $52 300 is determined to have depreciated by 23%. How much has the value of the asset decreased by?