The materials used by Hibiscus Company's Division A are currently purchased from an outside supplier at $$54$ per unit. Division B is able to supply Division A with $21,500$ units at a variable cost of $$46$ per unit. The two divisions have recently negotiated a transfer price of $$48$ per unit for the $21,500$ units. Enter an increase as a positive number and a decrease as a negative number.

a$.$ By how much will each division's income increase as a result of this transfer?

Division A $fill in the blank $1$

Division B $fill in the blank $2$

b$.$ What is the total increase in income for Hibiscus Company?

$fill in the blank $3$