An air travel company has fixed costs of $$100,000,$ variable costs per passenger are $$100$ and tickets sell for $$175.$ What is the contribution margin per unit and contribution ratio? $($Round to nearest $\%,4$ pts$)$

$$100$ per passenger, $43\%$

$$75$ per passenger, $43\%$

$$175$ per passenger, $57\%$

$$75$ per passenger, $57\%$