In addition to regular work remuneration, capital formation savings payments, bonuses for merit and for hazardous or unpleasant work, attendance premiums, bonuses for work at nights, on Sundays and on public holidays if liable for tax and SI contributions, one-time and recurring payments are all part of the actual gross amount received by the employee for part-time work for pensioners.
In the standard R/3 system, no model wage types are used in the 'actual gross amount for part-time work by pensioners'.
Use the view linked to this step to set your relevant wage types so that they are included in the appropriate cumulation wage type.