Urgent Help Needed for Kitten Siblings

Some irresponsible people (my bosses) agreed to take on kittens and then decided not to. To keep these kittens together, they're siblings, and save them from an uncertain fate, my compassionate co-worker has taken them in. The concern is they are brother and sister and I am trying to raise funds to get them spayed and neutered as soon as possible to prevent an oops litter.

They can be fixed one at a time, but the need is urgent and at least one should be fixed ASAP! Any help you can give toward this goal is appreciated.

Thank you!