Please, help me by answering these three questions in clear steps. Regards!

Question 1)

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Question 2)

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Question 3)

When Fred of tallied up his accounts at the end of the year he found he has paid GST on parking fees of $4000, supplies of $55,000, utilities of $2000, and miscellaneous eligible costs of $3300. During this same time, he found he had charged his customers GST on billings that totaled $75,000 for parts and $65,650 for labour How much GST must Fred send to the government? Fred must send to the government for (Type an integer or a decimal