PE51 condition on the text of the wage type

HI All,

I have to implement a rule in PE51 payslip ie when there are certian wagetypes in the RT table then the 1000 wt -Basic Salary should be displayed as Notional Salary

To Make it more clear;

If WT 4800 exits in RT table then 1000 wt should be displayed as 'Notional Salary' else (ie RT table do have WT 4800 ) wt 1000 should be dispalyed as Basic Salary

Can you please help me to solve the above requirement

Thanks,

Sheela