clear and consistent in order to avoid any misinterpretation.

All purchases of excess baggage are final and definitive.

The price established during the purchase is fixed and final.

The rest of the order remaining firm and definitive.

The market is held at unit prices, firm and definitive.

Five days later my dad made a difficult and final decision.

Say “no,” immediately, in a calm but firm and disapproving tone.

The price fixed at the time of purchase is firm and final.

The price fixed at the time of the purchase is firm and final.

His commitment is then considered to be firm and definitive.

All purchases of Additional Services are final and definitive.

The price fixed at the time of purchase is firm and definitive.

His commitment is then considered to be firm and final.

However, the rest of the order shall remain firm and final.

Use words like “because” and language which is firm and definitive.