I would like.to known if 350 $ is a decent.amount.to pay for two children for child support

Child support is based on the Florida Child Support guidelines worksheet and takes into account (1) the net monthly income of both parties,(2) health insurance, (3) day care expenses, and (4) the time sharing arrangement.  A computer program calculates the support using the above figures.  As such it is not possible to state whether $350 is an appropriate amount. You can find information about the child support guidelines online.