Multiple components in billing

Hi,

Currently I am facing one challenge in Billing as my customer provide space for containers storage and when they raise invoice to customer they consider three things Container Quantity, Number of Days and rate for one container per day. Kindly find example below.

Container Qty, Number of Days, Rate per one container per day, Net Value

20                           15                           10                                                           3000

(20 X 15 X 10) = 3000

How to map all these details in pricing procedure.

Kindly guide.

Regards,

Shantanu