Got a call from a consulting company for the developer position at eBay, set up an interview for phone screen. Asked about prior ebay experience and ebay tool experience (CAL). explained that I have used this tool for my development purpose to track a defect. Asked about MS Excel VLookup function and usage, asked that difficulty in processing Excel documents. How do you calculate avg for a response time for a given requests (say out 3 requests 1 took 150 ms, 2 req took 300 each).