Margin analysis

We are in E1 9.1. We would like to know what would best work setting up dmaai 4220 and 4230 in order to do our margin analysis. When we set up multiple inventory gl class this helps us to set up multiple dmaai 4230 and 4240 in conjunction with other inventory dmaais. Then we can flex accounts to get new account with subsidiaries. The benefit with this process is that we get all the information on the gl balance table and its easier to do margin analysis in broad perspective by getting the revenue and cogs right in the gl