Final answer:
Using Excel Solver, Angelica can determine the optimal number of servers for Xtra Crispy and Yolo Burrito by setting constraints on total and individual restaurant capacities and maximizing revenue generation based on servers' productivity at both locations.
Step-by-step explanation:
To determine the number of servers Angelica should allocate to Xtra Crispy and Yolo Burrito restaurants to maximize her revenues, we can use Excel Solver. By setting up the problem with constraints that Xtra Crispy can have up to 7 servers and Yolo Burrito up to 5 servers, with a total of 9 servers to be allocated, Solver will assist in finding the optimal staffing solution.
Clear objectives such as maximizing revenues, which are $400 per server at Xtra Crispy and $700 per server at Yolo Burrito, will be introduced to Solver. After running Solver with these constraints and objective, it will provide the highest possible revenue by suggesting the best distribution of servers between the two restaurants.