We make underwater microphones (hydrophones) with standard stock cable lengths, but many customers need special cable lengths. I would like to have a product option where the customer could select from any of the standard lengths or a "custom length". If the customer selects "custom length" he would then be prompted to enter a quantity for cable and then the cost per quantity would be added to the item price. Does anybody know of a way to do this?
Our current way of handling this is to ask customers to buy cable as a separate item, but it leads to confusion with customers and with our staff when more than one hydrophone is purchased.
If anybody knows of an add-on or technique, or would like to quote the creation of such an add-on, I'll be grateful to know about it.