Ray,
OK, I am slowly getting to the crux of the matter when it comes to the shipping calculations. The biggest issue that I am faced with is when a customer add an item to the shopping cart that comprises multiple boxes. For example, I am selling a large plant light cart called model GA3-P2. Model comprises of three boxes that are the following dimensions:
Box #1: 70" x 24" x 6"
Box #2: 57" x 18" x 6"
Box #3: 57" x 21" x 4"
However, the only dimensions that I am passing to eCart are the Box #1 dimensions of 70" x 24" x 6".
Do you recommend that I add the dimensions all up and pass the aggregate values to the Length, Width, and Height fields? So, instead of passing 70" x 24" x 6" I can pass 184" W x 62" W x 16" H. Would that be better?