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Determine values after a percentage increase or decrease as specified below:
a. A product that cost $300 last year has now increased in price by 12%. What is the new price of this item?
b. The number of sales of a particular item are expected to decrease by 33%. Given that the number of sales was originally 20 000, how many sales can now be expected?
c. A sales rep at a company is paid 15% commission on the sale price of an item. Given they sell an item for $5 200, how much will the company receive for the item after the commission has been paid?
d. An asset originally worth $16 990 is determined to have depreciated by 32.5%. What is the current value of the asset?