$2)$ The SecSys company manufactures home Security System. The company's fixed monthly cost is

$$50,000,$ and its variable cost per Security System is $$495.$ The company sells the Security

System for average cost $$999\mathrm{.}00.$

a$)$ Determine the monthly break$-$even in number of units and revenue.

b$)$ Find profit if SecSys sells $120$ unit per month.

c$)$ What is the upper limit on additional advertising budget if it increases sales by $10$ units per

month?

d$)$ Construct a break$-$even graph $($Cost$,$ Revenue, profit$)$ using X values from $0$ to $200$ at increment

of $10$ units in Excel.