I'd have just added "of sales" or "of my sales" after the dollar amount to make it more clear.
I actually looked at this because I thought Google had refunded money to the author and I wanted to see what had actually inspired an act of customer service from a company known for not having it.
I actually looked at this because I thought Google had refunded money to the author and I wanted to see what had actually inspired an act of customer service from a company known for not having it.