Several years back, economists developed methods for appraising investment projects fi-. nanced from public budgets, one of which is the use of âsocial cost-benefit analysisâ: a. test that weighs the costs and benefits of a public project in terms of its contribution to. national (social) welfare.
Pella Windows has shown its customer service address detail for its customers that are shown below. Address detail : Pella Corporation - Customer Service Department, 102 Main Street, Pella, Iowa 50219, United States. customer service number : +1-877-473-5527, +1-866-809-9460.
Phone Contact Numbers. 1  Residential Customer Service: 1-972-791-2888 or 1-800-818-6132. 2  Business Customer Service: 1-888-399-5501 (7 AM to 7 PM M-F) 3  Construction Customer Service: 1-800-711-9112 (8 AM to 5:30 PM M-F) 4  Property Management Customer Service: 1-877-968-7898 (8 AM to 5 PM M-F)