VB Script Round Function is not functioning correctly.

Hi Experts,

In vb script I have sent an arithmetic expression which is divisible by 2 is not rounding correctly : eg;
"Eval" functions return 80 for expression 80.5 but it should be rounded to next number.
how can this be achieved

I have tried evaluating following expression but it also throws error :

Val(Format((( 23 + 24 + 22 + 18 + 21 + 23 + 21 + 23 ) /2.0 ) ,"0") )

Thanks.