The sheet looks like all machines are divided through every buyer. So the first investors, whose machines are delivered first will have to give away something to the later investors. Shouldnt it be divided by the machines one bought?
That makes things at lot more complicated. Most investors wanted to invest in as many machines as possible, even if at first we were trying for just the one. What would happen, once they all arrive, if one breaks down but the other ones keep running? Or, in a less horrorlike scenario

if the last order arrives first?