"But as a business owner, true cost of sales, did I provide technical labor? Maybe it's only a percentage of my week, but perhaps it's going to be good for me when I'm looking at my gross profit levels, which indicates to me, is my pricing correct largely and am I going to have enough net profit at the end of the profit and loss of the week, the month, the year to obviously pay all my costs, pay my taxes and reinvest in this business to keep it going. We'll get into some psychology about growth, but can you tell me about the value of understanding true gross profit?"