First time applying

So I finally made an appointment after months of procrastination. So for my first question, For the payment it says check or money order. I made my appointment for my little brother as well, can I give my mom the money and she writes the check? Next question, can the $35 appointment fee and $130 application fee be put together as one to make it $165 or does it have to be 2 separate money orders, and or checks?