Mackay asked Monaghan if Fonterra was guilty of being "a bit optimistic" with its 2018/19 farmgate milk price forecasting at $6.75.
"We want to be a lot more accurate with our forecasting. We want to deliver on the milk price and the forecast earnings," said Monaghan, who reported that Fonterra looked to supply and demand around the world and watched the NZ/US cross rate closely to help with accuracy.
"Be assured that we will have real focus on getting our forecasting right and also getting our earnings projection correctly and to do that we really need to make sure we sell the right volumes and control our costs."
Although Monaghan was trying to accentuate the positive he admitted the current situation would be a disappointment to Fonterra farmers.
"We have lost a lot of trust from our farmer shareholders in the investment and also unit holders. We need to work hard to get that back and we'll be doing everything in our control to do that."
Also in today's interview: John Monaghan defends Fonterra against Cabinet Minister Shane Jones' comment that the co-op's "top earners don't deserve the minimum wage."