Please note that the £100 and £120 are labour charges and do not include materials.  If they included materials, then it wouldn't be strictly income.  It shouldn't make much difference though, and this was just an example in any case.  In reality, each person's figures will vary.

If your conversion rate was already high (over 50%), then it would be harder to achieve these kind of results.  You will still definitely be able to increase your conversion rate and income, but

Will turbo charge the earning potential of any plumber, whether they become a PlumbersAid partner or not.  The irony is that very few plumbers will implement the system, which makes it all the more effective for the few that do.