I have no idea what the measurements are in the invoice. # of lights? But it's listed like this:
Trimlight System Installation of colour matched aluminum channel. Installation - 13mm pixel bulbs every 6", control panel (in garage if possible) and hard wiring to panel (through attic space if available).
Front Roofline
164 x $19.55 = $3,206.20
Back Roofline
41 x $19.55 = $801.55
Left Roofline
42 x $19.55 = $821.10
Top front gable
18 x $19.55 = $351.90
Subtotal
$5,180.75
GST
$259.04
Total
$5,439.79