Depends on what you want to do but I suspect that any # less than 0 should be negated (e.g. -50 should be 50). In that case you can use ABS()
function.
vb
ABS(PaymentValue)
If you want to simply combine multiple conditions using logical AND and OR then you can do that as well with logical operators.
vb
(PaymentValue < 0) || (PaymentValue > 99999)) ? 0 : PaymentValue