In the Pete$$s Pipes example discussed in the class, the fixed cost was $$10$K and variable cost was $$1\mathrm{.}5$ per unit. The demand curve was given by Q $=25-5$P$.$ The optimal price obtained by running Solver was $$3\mathrm{.}25$ and their profit was about $$5310.$ Pete$$s Pipes finds out that their fixed cost is going to go down from $$10$K to $$7$K$.$ Without running Solver, Pete$$s Pipes determines that this is the new Profit.