Question: A souvenir store charges PHP 15.00 per keychain for the first 50 orders. If the order exceeds to 50 keychains, the store charges PHP 12.50
A souvenir store charges PHP 15.00 per keychain for the first 50 orders. If the order exceeds to 50 keychains, the store charges PHP 12.50 per keychain for the exceeded orders of keychains. Express the total cost K(x) of the x number of keychains as a functions of x.
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