Answer:
$62
Step-by-step explanation:
Producer surplus is the difference between the price of a good and the least price the seller is willing to sell the product
Producer surplus = price least price the seller is willing to accept
Producer surplus :
For Alice = $50 - $20 = $30
For Amber = $50 - $22 = $28
For Andi = $50 - $46 = $4
Total producer surplus = $30 + $28 + $4 = $62