How much does this cost to the nearest dollar?

Siding Mounting Block, Octagon Siding Mounting Kit with Built-in Box, Siding Light Blocks for 1/2 inch Lap Double, Pack)
Color upgrade The Vapikirv outdoor light siding mount is made of thick, quality plastic and has a solid feel to it. Most outdoor light are black. Now we have launched a black Vinyl light block to facilitate the matching of lamp colors. Easy to use Fast and easy to install this octagon siding mounting kit. Run wires through center punch hole. Safer to have your wires in a box. There is a weep hole on the bottom that needs to be left open to allow any water that does deep in behind the block to escape. Size Details Size 4 Inch Diameter X 6.61 Inch Width X 

Price is $39.00
Price: $38.99