Hair and makeup tipping

I feel like this is obvious, but how do I tip for hair and makeup services. I am getting hair and makeuo from a company and they just combined the price, so say its total 300. Each separately would be 150. Do I tip 25% to both of them for the 300 and then they split it up thenselves or do I tip them both separately off of there one services say 25% of 150. It wouldn't make much sense to tip them both separately 25% of 300 because that is for both of their services together. That's like tipping them both for hair and makeup.