Five numbers inputed into their owner database feilds by the use of a form

Judge 1, Judge 2, Judge 3, Judge 4, Judge 5

I need the high and low remove and the remainder 3 numbers added up and it will be put in feild call Total (which is displayed in my form)

Then i am dividing this by 3 and putting it in a feild call score which is also display .

I have the table,forms created just need the VB code for the feild Total,

I already have VB code for score

I know this is simple but I am new and only doing this as a hobby

Thanks