In a MRP problem, A is a MPS item. Every A requires $2$ B$\text{'}$s and $3$ C$\text{'}$s$.$ Every B requires $5$ C$\text{'}$s$.$ All lead times are two periods. Initial inventory values for A is

$100,B$ is $200$ and $C$ is $0.$ Use lot$-$for$-$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 $5?$

Multiple Choice

$800$

$1,600$

$1,200$

$1,400$

$700$