My question is the related with escalation under Clause 10CC.

The work was awarded in May, 2013 with completion period of 36 months.  The work is a composite work inclusive of Civil & Electrical works.  Now earlier (May, 2013) the all India whole sale price index for electrical works are not issued and Civil indexes are taken for base indexes.  Now separate indexes all India whole sale price indexes are issued for Civil & Electrical works separately.  Now question is that how to calculate escalation for Civil & Electrical component can be calculated for payment to the agency.