I have 500 items, and each has a net price and a gross price. This is self-evident, and even if I have 5, 10, or 200 items in my offer/invoice, my customer sees the price column (net price) but not the total, which is important information for my customer in B2B business; we are only talking about net prices. However, the subtotal is always the gross amount; in my opinion, it is not possible otherwise in your offer/invoice. However, I additionally need the net total.