When you order cpap supplies we are required to bill each item separately. Here is an example of the items listed on your bill for cpap resupply:
Mask Frame Mask Cushions (up to 3 per order)
Or
Nasal Pillows (up to 3 per order Headgear  Standard or Heated Tubing Water Tank or Reservoir Mask Filters (if applicable)  CPAP machine filters (6)