Assuming the original quantities supplied at each price are as follows:
- At $3.00: 350 heads
- At $2.50: 310 heads
- At $2.00: 270 heads
- At $1.50: 230 heads
- At $1.00: 190 heads
- At $0.50: 150 heads
Answer for part a:
New quantities supplied at each price after the increase of 50 heads:
- At $3.00: \( 350 + 50 = 400 \) heads
- At $2.50: \( 310 + 50 = 360 \) heads
- At $2.00: \( 270 + 50 = 320 \) heads
- At $1.50: \( 230 + 50 = 280 \) heads
- At $1.00: \( 190 + 50 = 240 \) heads
- At $0.50: \( 150 + 50 = 200 \) heads
New Supply Schedule:
| Price (dollars) | Quantity of Lettuce Supplied (heads) |
|——————|—————————————|
| $3.00 | 400 |
| $2.50 | 360 |
| $2.00 | 320 |
| $1.50 | 280 |
| $1.00 | 240 |
| $0.50 | 200 |
Answer for part b:
At a price of $1.00 per head of lettuce, the original quantity supplied was 190 heads of lettuce, and the new quantity supplied is 240 heads of lettuce.
Explanation: The original quantity supplied at $1.00 was 190 heads, and after the increase of 50 heads due to decreased rental costs, the new quantity supplied is 240 heads.