What do you consider big? $4 is a loss of 13.8% of the sales price. If you assume he already has some costs (his time to write the book is quite valuable), the

What do you consider big? $4 is a loss of 13.8% of the sales price. If you assume he already has some costs (his time to write the book is quite valuable), the loss in profit is even more. A 13.8% loss in profit would sink many businesses.