Hi Mary,

Currently SmithCart doesn't support a feature to calculate two fields together but I do think its a great idea and would be an excellent feature enhancement. If you would like our programming dept. to provide a quote to develop the ability to calculate the price of based on what the Length and Width selected please send an email with a link to this forum post to sales@smith-consulting.com. we quote all features below cost since it is enhancing the module.

Thanks,