1. Choose time period (e.g. 2017)

2. See number of enquiries by source for that period

3. See number of paying customers by source for that period

Fro example, I may have received 50 enquiries from Source A in 2017, of which 5 converted into paying customers. This gives me a 10% conversion rate by source. I can see income by source already, but that doesn't tell me the conversion so doesn't give me a measure of the time/effort/expense to get those customers. And I can see the total number of enquires by source (Settings > Source) but that is for all time and does not allow me to see how many I received over a particular period.