accountant
n.— «The taxi drivers are catching on fast too.…An “accountant” collects the fares, provides change and squares up the money angle of the trip. This frees the driver to do his job without endangering the lives of the customers. In the past, fatal accidents were attributed to drivers making change or changing music tapes while driving at high speed.» —“Motswana punctures foreign waffle with silence” by Nthabi Moreosele Sowetan (South Africa) Nov. 20, 2007. (source: Double-Tongued Dictionary)