Read a wage type

Hello Experts

How can i read a wage type amount in another wage type (from Rt table)

For Example:

WT Z001 coming with splis

Z001                       01                           20

Z001                        02                         300

Now, in custom wage type 9001 i have to read both values of split.

Scenario is:

Few employees having Split of WTZ001 and  few employees having single entry in WTZ001

How to cover borth these (single and split values for Different employees)

Regards

SK