Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Monica made cookies for herself and her family. Her father ate 10 cookies and her mother ate half as much as the father. Her brother ate 2 more than her mother. How many cookies are left for Monica if she made 30 cookies in total?

### Response:
Monica's mother ate 1/2 * 10 cookies = <<1/2*10=5>>5 cookies.
Her brother ate 5 cookies + 2 cookies = <<5+2=7>>7 cookies.
There were 30 cookies - 7 cookies - 5 cookies - 10 cookies = <<30-7-5-10=8>>8 cookies left for Monica.
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