Final answer:
Without knowing the profit Kevin makes per magazine subscription, it's impossible to calculate how many subscriptions he needs to sell to earn $225 for a new smart phone. Additional information is required for a precise calculation.
Step-by-step explanation:
The question provided does not contain enough information to determine how many magazine subscriptions Kevin needs to sell to buy his new smart phone. The information provided discusses Marie and Jade's weekly budget and spending habits related to magazines and pies, not the details about Kevin's situation such as the cost per magazine subscription or any sales commission he earns. An accurate answer requires additional details regarding Kevin's earnings for each subscription sold.
If Kevin knows how much profit he makes per subscription, he can To find the maximum number of magazines Kevin can buy with his budget, we need to divide his budget by the price of a magazine. In this case, each magazine costs $4.Therefore, the maximum number of magazines Kevin can buy is $225/$4 = 56.25 magazines. Since you can't buy a fraction of a magazine, Kevin would need to sell at least 57 magazines to cover the cost of the phone.