A researcher wants to see if lighting levels aects worker productivity at the Lights-n-More factory. To conduct this study, the researcher manipulates the lighting levels each week for a month, and assesses worker productivity for each month. Based on this scenario, what is the constant (NOT a variable)?Scrumptious Snacks Inc. manufactures three types of snack foods: tortilla chips, potato chips, and pretzels. The company has budgeted the following costs for the upcoming period: Factory depreciation $28,057