Final answer:
The amount of chicken to be purchased was not specified in the question. The cost calculation would typically be done by multiplying the weight by the price per pound.
Step-by-step explanation:
The question asks how much chicken you'll be buying but does not provide enough information to determine the exact amount. Normally, to calculate the total cost or savings, you would multiply the weight of the chicken by the price per pound. For example, if you were planning to buy 4 pounds of chicken at the store across town at $2.79 per pound, you would calculate the cost as 4 pounds x $2.79/pound.
However, the question as provided does not specify the amount of chicken that needs to be purchased, therefore it cannot be answered. The decision of how much chicken to buy would typically be based on the number of people you are planning to serve, your budget, or other meal-preparation considerations.