OK. If all line items have the same unit of measure, the sales quote will add up quantities and display the total. That feature was added in response to users who demanded to know how many total items were being shipped. In the example below, the unit of measure for the case of light bulbs was edited temporarily to “Each:”
If the unit of measure for that inventory item is restored to its normal value of “Case,” the total disappears, and the column heading reverts from “Each” to “Qty,” because a total of dissimilar units of measure makes no sense:
You can suppress all totals, including the total quantity by checking the option to Hide total amount:
That produces a View like this:
That option is customarily used when providing a customer with options for various line items, such as when you expect them to choose one product but give prices for several. But when you are expecting the customer to buy the entire quote, what is the harm of showing the total quantity? After all, you are then showing the total price.