The Role of Capital in the Production Process

In cases where working time and circulation time are equal, assuming that the costs will remain the same throughout, then no capital is going to be freed up. But mark says that if the circulation period is higher, without forming a simple multiple, then youare going to earn profit. So this would be a case in which perhaps three weeks is spent on a or not four weeks. Does that work? Let's say five weeks. According to his math here, that means you are going to be making money. Capital is going to being set free for it to be then used back into production.