Problem: The third scenario, we focused on change in cost of additional fuel if fuel cost at Copenhagen is increased by 10 cents, i.e., the fuel cost to 0.78 from 0.68. Using Solver, we calculated additional fuel needed with given constraints then multiplying the additional fuel cost with the fuel cost for every single route and product sum it to find the optimal cost. The optimal cost came out to be $20135.26239. This scenario has similar results to scenario two where the optimal cost surpasses the budget cost of $20,000.