Storytelling 101: How much will you pay for a bag of dirt?  
How about $7? What, for dirt?

Well, how about for 462 cubic inches of lightweight premium aerated potting soil, with a mixture of peat, clean soil and fertilizer.  Perfect for new plant growth, plus a slow release fertilizer, to help your plants look great and green for a long time.

Dirt?  Worth next to nothing,  Storytelling:  priceless

PS: Yes, I paid the $7 for the potting soil. ;0)