Asssessment / Indirect allocation

Hello All

Would like to know how to setup KSu5 or KSc5 for below scenario.

Sending  Cost center   Amount posted GL

CTR 1                      GL-1 - $100

CTR 2                       GL-2 - $200

Receiving Cost center - CTR3, and SKF posted say 100 and Activity maintained rate - $10

Now i want to set allocation in such a way, where the allocation amount based SKF and Activity Rate 1000 ( 100 * 10) should be sent on the basis of 1:2 from cost center 1 and 2 means CTR 1 should get credited for 333 and CTR 2 should get credited for 667 and CTR 3 should get 1000$ alllocated.

In simple based on sending cost center posted value.