Oops, sorry. GST is $10\%$

Also please help me with this too. Im stuck.

Maya has commenced business as a retailer of paper boxes, MAY Enterprises that is registered for GST$.$ The GST accounting is done on an accrual basis for each quarter.

Expected sales are:

Cash sales is $20\%$ while credit sales is $80\%$ of the expected sales.

The collections from accounts receivable $($debtors$)$ is expected to be according to the following pattern:

$80\%$ in the month of sale

$10\%$ in the month following the sale

$10\%$ in the second month after the sale

Expenses are estimated to be:

July

Stock Purchases $-$ $$30,000$

Salary $-$ $$30,000$

Other Overheads $-$ $$5,000$

August

Stock Purchases $-$ $$22,000$

Salary $-$ $$10,000$

Other Overheads $-$ $$5,000$

September

Stock Purchases $-$ $$24,000$

Salary $-$ $$12,000$

Other Overheads $-$ $$5,000$

Other Overhead above includes depreciation expense of $$2,000$

Stock Purchases are paid for in the month of purchase

Administration Expenses consists of $15\%$ of the sales for each month

Other overheads and salary are paid for in the month in which they have been incurred

Opening balance of the Bank Account on $1$ July is $$85,000$

Ignore GST for the purpose of this budget.

Required:

a$)$ Accounts Receivable Budget $($i$.$e$.$ Cash Receipts Budget$)$ for July to September showing the total collections

b$)$ A cash budget showing the receipts and payments for July, August and September including the cash balance at the end of each month