Using Multiple Material Burden Purchasing Cost components

Hi,

We have setup freight as Material burden Purchasing Cost Component (using 4337 AAI) JDE version : WS A 7.3.Now we want to add Tariff as additional purchasing cost component to the material burden and need to route it to a different account. Please advise how we can setup multiple cost component for purchase cost burden using 4337.(We do not want to use landed cost for tariffs since landed cost component is not rolling up to unit cost for  07 Standard Cost method).

Please advise :

1. How we can use multiple purchase cost components for material burden

2. Can landed cost roll up to unit cost for standard 07 cost method.