"Forty Years or so...."

On the way back from taking Chris to the bus stop.....
Parker: "Why does Dad have to go all the way to California to count milks in a warehouse?"
Mom: "Because that's his job, sweetie."
Parker: "I already miss him more than the sun."
Mom: "I know, me too."
Parker: "It's just counting milks is so easy.....1,2,3,4,5,6,7...that's all you have to do. Does Dad do anything else? Someone else could count the milks."
Mom: "Dad's also good at solving problems and helping people figure out a faster-better way of doing something. Like........"
Parker: "Like a farmer who uses a machine to plant lots of plants in the field at the same time?"
Mom: "Uh, yeah. Good example. Yes, something like that, exactly."
Parker: "Well, what else does Dad do at work?"
Mom: "I don't know, Sweetie."
Parker: "Well you should know, you've knowed Dad for 40 years or so...."