How to set up DBAs for Medical Insurance

Hi to everybody,

Based on our policy the employee Medical Contribution is calculated as a percentage on a flat amount: one amount regarding the employee and one amount for each of his dependents. The percentage and the amount vary per employee and dependent.

Example:

Employee Med Amount = 50 ,  Percentage = 50%

Dependent 1 Amount = 40  ,     Percentage = 60%

Dependent 2 Amoount = 30 ,    Percentage = 50%

…….

Dependent X Amount = 30 ,      Percentage = 20%

Medical Contribution = (50 * 50%) + (40 * 60%) + (30 * 50%) +…+ (30 * 20%) = …

Can anyone suggest a way to setup the system (with less DBAs as possible) apart from creating one DBA for the employee and one DBA for each dependent?

Antonis