Final answer:
Janis should sell the pizzas for $6.00 after applying a 50% markup on a $4.00 cost, which results in a $2.00 increase. None of the options a to d correctly represent the selling price with a 50% markup.
Step-by-step explanation:
If Janis' boss wants a 50% markup on the cost price of the Pizza Hut pizzas and the cost is $4.00, to find the selling price, we would calculate 50% of the cost price and then add it to the original cost. A 50% markup on $4.00 is $2.00 (50% of $4.00), because 50% is the same as multiplying by 0.5. Therefore, the selling price would be $4.00 (cost) + $2.00 (markup) = $6.00.
However, based on the additional information provided about the demand equation and profit maximization strategies, the demand equation Qd = 16-2P can be used to understand consumer behavior but it is not directly relevant to determining the selling price with the markup. For the Authentic Chinese Pizza shop, it chooses a price of $16 based on other factors such as marginal revenue and marginal cost to maximize profits which is different from Janis' situation.
Thus, the correctly marked up price from Janis would be the cost plus the 50% markup, which results in a selling price of $6.00, which is not listed as an option in the provided choices a to d.