There were a number of bottles and cans filled with a liquid that could help them overcome the Diseased Wolf's sense of smell. It didn't smell too bad, but no one was keen to spray it on themselves. Eventually, they decided to put it on, but only after they saw the Wolves.
There were also antidotes for rabies. If you consumed them, you could get rid of the debuff, but the cost was rather expensive.
Ashlam Valorfist's business abilities were as good as his fighting abilities. He knew that Lu Li had to buy the items, so he took a hard-line stance on the prices. Lu Li wouldn't have had to spend this much money if he prepared earlier, but now he had no choice but to pay.
Now that they had these items, they were able to complete the quest.
As for whether this would result in a profit or a loss remained to be seen, but they had made all the preparations they needed.