$17.$ On January $11,2017,$ invoice $238$ was issued to John Harrison $($Quick Add new customer$)$ for $3$ hours Landscape Design @ $$40\mathrm{.}00$ per hour plus GST for a total invoice amount of $$126\mathrm{.}00.$ John indicated that he would call Bonnie Doon Landscaping to have the specified work completed when he was ready.