how the tax free wage component(sodexo coupon) amount should be adjust CTC component total like Supplementory Allowence wage type?

Dear Experts,

How to adjust Sodexo Meal coupon Wage type Amount is Rs.3500 in supplementary Allowances wage type total amount.

Example:        Every month Sodexho coupon amount is 3500

                              Supplementary allowances amount 20000

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            After adjustment supplementary allowances =   16500

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if an employee eligible for Sodexho then his total CTC adjusted in Supplementary Allowances component but total CTC amount should not crossed.

Option1; how to write the PCR for above scenario, any one got idea please share.

Option 2: I need to go for custom development for calculation

     Please guide me best option either option 1 or 2

Regards

raghu