Aschool fund-raising group sells chocolate bars to finance a swimming pool for their physical education program. the group finds that when they set their price at x dollars per bar (where 0 < x ≤ 5), their total sales revenue (in dollars) is given by the function r(x) = −400x2 + 2400x.(a graphing calculator is ) evaluate r(2) and r(4).r(2) =$r(4) =$what do these values (2) and r(4) represent their total sales revenue when their prices are $2 and $4 per bar (2) and r(4) represent their total profits when their profits are $2 and $4 per bar respectively. r(2) and r(4) represent their total expenses when their expenses are $2 and $4 per bar (2) and r(4) represent their total profits when their prices are $2 and $4 per bar (2) and r(4) represent their total expenses when their prices are $2 and $4 per bar respectively.