Final answer:
The total change in value of Heather's 80 shares of stock, which increased by $8.00 per share, is $640.00.
Step-by-step explanation:
Heather owns 80 shares of stock, and the value per share has increased by $8.00. To calculate the total change in value of her shares, we simply multiply the number of shares by the increase in value per share.
So the calculation would be:
80 shares × $8.00 per share = $640.00
Hence, the total change in value of Heather's stock is $640.00.