Ann: Market update, page-38

I was going back through some of the previous 4C quarterly reports for TNT and noticed that the "product manufacturing and operating costs" seem to be increasing quite rapidly, much more so than say the staff costs (which would be expected given the growth due to acquisitions) :

.................(b) product manufacturing & operating costs........(e) staff costs
FY22 Q1..................$26.081m..................................................$12.227m
FY21 Q4..................$16.305m..................................................$10.467m
FY21 Q3..................$11.368m..................................................$8.168m
FY21 Q2..................$13.318m..................................................$8.204m

Does anyone know what these "manufacturing and operating costs" actually represent ?

All IMHO, DYOR