To determine warehousing rates, a warehouse company will take into consideration the business costs involved in keeping and running a warehouse and a subsequent value per square foot/square metre. They will also have a level of value to add to create a profit margin. The capacity of space used at any one time within a warehouse generally fluctuates due to goods moving in and out and/or being processed within the warehouse facility. Although warehousing, fulfilment and eCommerce customers share similar fundamental services from a provider, they are likely to still have some unique requirements. Therefore a warehouse will consider all of the above factors in order to create a viable costing structure for any individual business requiring their services.