The loss will be same as long as current magnitude is same irrespective of what the power factor (pf) of the load current is. Just to clarify consider a single phase 110 V /220 V transformer . Let its Req=eqivalent resistane be 3 ohm (referred to 220 V side). Let it be rated 2.2 kVA.
Actually in the US is the cost of sand is about $11-13/Ton.
Fortunately, the average pea gravel cost does not vary too much: Minimum Pea Gravel Cost: $30 per ton or $4 per bag; Maximum Pea Gravel Cost: $55 per ton or $8 per bag; Pea Gravel Installation Cost: $220 to $365 for 200sf; As you can see, pea gravel prices are not expensive and luckily, you donât need much more than one ton for most gravel projects.