In an MRP problem, A is an MPS item. Every A requires $2$ B$$s and $3$ C$$s$.$ Every B requires $5$ C$$s$.$ All lead times are two periods. Initial inventory value for A is $100,$ B is $200,$ and C is $0.$ Use lot$-4-$lot method for order quantities for all items. If gross requirement for A is $800$ in period $9,$ what will be the planned$-$order release for B in period $5?$