Avoid obstacles and measure distances with the ultrasonic range finder. Device emits a high-frequency sound wave that alerts the robot to things in its path. A Programming Kit is needed to change the program in the VEX Controller. Measure distances from 1.5in to 115in. Detect obstacles using high frequency sound waves.
If it's a gallery, they will usually expect to be paid 50% - 60% of the selling price. If you need to be paid $499.80 for the quilt, that means the person the gallery is selling it to will need to pay at least $999.60 for the quilt.
To calculate the cost of hand quilting your quilt, multiply the length (in feet) times the width (in feet) times the cost per square foot. For example, a full size quilt 78 x 90 quilted using simple outline and straight line quilting would be 6.5' X 7.5' = 48.75 sq.feet @ $6.00 = $292.50.