Can first stage dealer charge cenvat credit amount in invoic

Hi,

I am a first stage dealer. as of now I am only the cenvat credit to customer thro excise invoice.

the question is :

I put the selling price + vat of 5.5% in commercial Invoice.

1> Can I charge the cenvat credit amount in the commercial invoice ie selling price + vat of 5.5%+ cenvat amount, as per the excise invoice(cenvat credit).  is it leagal?

2> if customer accepts to pay the cenvat credit , can I charge in invoice.? is it legal

pl help.