The Finance Departement of your firm is analysing the effect of change in price on the sales of a product. In $2020,$ the firm preduced $3600$ units and sold them for $$3\mathrm{.}5$ per unit $.$ if the firm intends to sell $24\%$ more units with a $40\%$ increase in price in $2021.$ How much revenue will the firm generates $?$

$$27,970$

$$21,890$

$$21,874$

$$27,280$