Visual Basic problem using Val

Put Val around any data that is typed in. For instance:
GuitarCost = Val(txtPrice.Text) * Val(txtQuantity.Text)

"All you need to do to learn circular logic is learn circular logic"

The use of Val(str) as double
It is use to capture the numeric value in a string.

like:
dim str as string
dim num as integer

str = "1234"
num = val(str) + 10 ''num=1244

str = "123a"
num = val(str) + 10 ''num=133

str = "12a3"
num = val(str) + 10 ''num=22

in your case, i think is that:
GuitarCost = val(price) * val(quantity)

Thanks for the help on the mental lapse I had.