A) $6.17 each X 4 poster boards = $24.68 total
B) $200.20 total / 4 lights = $50.05
C) $200.20 on lights + $24.68 on poster boards = $224.88 spent in total
$300 available - $224.88 spent = $75.12 left over to spend
In the limbs, flexion decreases the angle between the bones (bending of the joint), while extension increases the angle and straightens the joint.
Answer and working out attached below. Hope it helps.
