Program for HS economics classes. Put in the market value, millage rate and HB90 rate to find various values, such as assessed value and gross tax. For HS economics classes. Input the market value, millage rate and HB90 rate to find different values. All of the values given are as follows: assessed value, gross tax, HB920 credit, net tax, rollback, tax due, and 1/2 year tax. e-mail to Science200@aol.com