There are instances when the client isn't aware of everything that goes into creating and delivering the photos they end up with so a more detailed quote can help them to understand and accept the total. On the other hand, as the others here have said, a more detailed quote can provide the client with more ideas for cost cutting. So there's no clear answer that applies to all situations. If the client doesn't expect a detailed quote and you don't feel like you're in a good position to strongly defend each item then don't provide a detailed quote. On the other hand, if the client expects all of the major charges itemized, or if in your estimation, knowing what you do about the client, a detailed quote will help you win the job at the price you want, then go ahead and provide a detailed quote.