The problem $($Transshipment Network$)$

Solve Balanced and Unbalanced Problem $+$ Introduce new constraints

$1.$Suppose demand at DC$1$ increases to $400$

$2.$Suppose Demand at DC$1$ increases to $500$

$2\mathrm{.}1.$ Plant $2$ cannot ship more than $300$ units to Warehouse $1$

$2\mathrm{.}2.$ Ship at least $100$ units from Plant $3$ to Warehouse $1$

$2\mathrm{.}3.$ Warehouse $2$ cannot ship to DC$2$