Bids worth Rs 54,600 crore were offered by telecom companies on the fifth day of the ongoing spectrum auction today with Delhi witnessing aggressive bidding for both 900 Mhz and 1800 MHz bands. Telecom Secretary MF Farooqui said the total value of the bids was Rs 54,600 crore after 35 rounds of bidding. "Activity is on in eight service areas. Bidding will continue tomorrow morning," he added.