Interbranch Order

We have SetUp SI order, and Cost will be same as Price, but when we Enter the Order and check the "Cost and Price" From Branch Plant "will not be the same" as "Cost and Price" To Branch Plant, it must be same,  basically we don't want any financial impact, therefore setup is like that,  it is just Stock transfer and not charging from Order Delivered Company because it is our Sister concern company,

Somebody can help us, why cost and price  difference is there?

Following is window for your reference,

Thanks