$$Hyperion$,$ Inc. currently sells its latest$$high$-$speed colour$$printer$,$ the Hyper$500,$ for $$373.$ It plans to lower the price to $$320$ next year. Its cost of goods sold for the Hyper $500$ is $$213$ per$$unit$,$ and this$$year$\text{'}$s sales are expected to be $15,000$ units.

a$.$ Suppose$$that$,$ if Hyperion drops the price to $$320$immediately$,$ it can increase this$$year$\text{'}$s sales by $21\%$ to $18,150$ units. What would be the incremental impact on this$$year$\text{'}$s EBIT of such a price$$drop$?$

b$.$ Suppose$$that$,$ for each printer$$sold$,$ Hyperion expects additional sales of $$81$ per year on ink cartridges for the three$$years$,$ and Hyperion has a gross profit margin of $64\%$ on ink cartridges.

What is the incremental impact on EBIT for the next three years of a price drop this$$year$?$