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.
As an indication, a wood floor sanding cost can range from Â£9 to Â£12 per square metre for large areas and moving up in price per square metre for smaller areas. Smaller, one or two rooms can range from Â£15 to Â£20 per metre depending on the details of the work.