You have decided on your slab format and a joint width, the decision in how the slabs are to be stored has been made and the area has been measured. Now you would only need to know how many spacers are needed for the object to avoid overstock or construction stops due to lack of material as much as possible.
The VOLFI Calculator will answer this questions for you. Enter the planned dimensions in the fields of the demand calculator and it will automatically show you the required quantities for the most common composite types.