Jemima$$s Casuals sells high$-$class ladies outfits. It has an outlet in Dixie Value Mall. Its marketing policy is to sell every outfit for a fixed price of $$75.$ The normal mark$-$up is $50\%$ of cost$,$ so selling price is $150\%$ of cost$.$ The fixed costs consist of rent, salaries, etc. and are $$5,000$ per month. If it decides to hire one additional salesperson at a salary of $$2,250$ per month, the number of additional outfits it will have to sell to remain equally profitable is

$1$ point

a$)50$

b$)75$

c$)90$

d$)120$

e$)$ none of the above