Final answer:
Amy earned $8031 from selling her shares of Monsanto Company today.
Step-by-step explanation:
To calculate Amy's earnings from selling her shares, we need to consider the costs of buying and selling the shares. Amy purchased 100 shares of Monsanto Company at $66.10 per share, which means she spent 100 x $66.10 = $6610. She then sold the shares at $80.45 per share, which means she received 100 x $80.45 = $8045. However, she also incurred charges of $7.00 for each transaction, so her total charges were 2 x $7.00 = $14.00.
To calculate Amy's earnings, we subtract the charges from the selling price: $8045 - $14 = $8031. Therefore, Amy earned $8031 from selling her shares today.