Your OIEC$/$Principal Agent has asked that you evaluate the agency financial business performance against Ace Real Estate Agency$$s Business Plan and answer the following questions:

a$)$ If the agency needed to increase revenue by $15\%$ per annum, what dollar amount would this equate to if the current revenue is $$3,500,000$ per annum?

b$)$ If the agency could increase its retained percentage of sales commission to from $2\mathrm{.}23\%$ per property to $2\mathrm{.}5\%$ per property, how much more income, in dollar amount, would this mean per annum $($the average selling price is $$627,000,$ quantity of $250$ sales per annum$)?$

c$)$ If the average selling price in the next $6$ months increased by $2\%$ and the retained commission increased to $2\mathrm{.}5\%,($assume quantity of $250$ sales$)$ what dollar amount would this equate to per annum for the sales department?