Browns, a local bakery, is worried about increased costs particularly energy. Last years records can provide a

Question:

Brown€™s, a local bakery, is worried about increased costs€” particularly energy. Last year€™s records can provide a fairly good estimate of the parameters for this year. Wende Brown, the owner, does not believe things have changed much, but she did invest an additional $ 3,000 for modifications to the bakery€™s ovens to make them more energy efficient. The modifications were supposed to make the ovens at least 15% more efficient. Brown has asked you to check the energy savings of the new ovens and also to look over other measures of the bakery€™s productivity to see if the modifications were beneficial. You have the following data to workwith: