Back in January, I reviewed a program called JS Estimating by Jenny Systems (1776 Asbury Road, SE, Grand Rapids, MI 49506; 616/942- 8220) commenting that at the rockbottom price of $150, I wasn't sure how owner Fred Meyerson was going to market his product nationally and stay in business. Well he has, and maybe the reason is how easy his program is to load, use, and of course, buy. If simple is what you want, JS Estimating is definitely worth a look. And now for some more good news, JS Estimating has a sibling. JS Job Cost The new member in the Jenny Systems family that makes the JS Estimating system even more attractive is called JS Job Cost. It