I figure you have about $80 - 115 in just the materials.
(approx. 8 yards both sides of fabric at $5 - 8 per yard)
batting at ($20- 30)
$5 for thread (may be a little low on that)
So you are allowing $88 to 68 for your labor. Only you can answer if you are comfortable w/ those wages for your time and skill level.