Listview and numeric up and down

[Ezpz]

iv experimented everywhere for when:

the numeric up and down function equals one then it will ad 1.50 to the list box price

numup.value = "1.50"

thats the numeric up and down value code i think its rite

and then

txttot.text = txtdis.text + numup.value

does that look rite i cant get it to work :/