This is not good for you. Revenue-cost-expense = profit. If you have no cost, your company's profit will be high and the corresponding income tax will be high. You can work out the account yourself. 17% invoice or 25% income tax?
What you added later, many enterprises have it, because now it is a buyer's market, and the supply exceeds demand, so you can lower the price. If the negotiation is good, you can get 5% of the invoice of 17%, but you must pay at face value. Otherwise, it will be difficult to settle this account.