EMILY :

for mom
I will buy some perfume.
for my firend
I will buy sone
for my sister
some lipbom

CORRECT :

If I will buy things for three people, I will buy some perfume for my mom, some (what you want to give) for my friend and a lipbalm for my sister.

EXPLANATION :

I changed your statements into a sentence. It is better to answer a question with a sentence for you to be better understood. Be careful with your spelling like 'lipbalm', 'friend' and 'some'. When answering a question, you can use the idea of the question as your introductory words.

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Hi Emily! I'm glad you did your homework for this week. You did good with your homework. I just want you to take note of the things that I have said on the explanation. Keep doing a good job.
~Teacher Louise