I need help figuring out the beginning balances and retained earnings for the below journal and adjusted journal entries, can you assist in populating the beginning balances and determine the retained earnings?

Happy House Bakeshop opened for business on October 1, 2018. During the month of October, the following transactions occurred: October 1: Issued $20,000 of common stock for $20,000 cash. October 1: Purchased a delivery van for $11,000. Paid $4,000 in cash and borrowed the remainder (long-term) from the bank. October 3: Purchased baking supplies for $900 on account. October 5: Paid $1,800 on a one-year insurance policy, effective October 1. October 12: Billed customers $4,800 for baking services. October 18: Paid $1,500 of the amount owed on the van. October 18: Paid $500 of the amount owed on baking services. October 20: Paid $1,700 for employee salaries. October 21: Collected $1,200 from customers billed on October 12. October 25: Billed customers $1,900 for baking services. October 31: Paid gas and oil for the month on the delivery, $500. October 31: Paid an $800 dividend. Adjustments: (a) Earned but unbilled fees at October 31 were $2,500 (b) Depreciation for the month was $500 (c) One-twelfth of the insurance expired (d) An inventory count showed $300 of cleaning supplies remaining on October 31 (e) Accrued but unpaid employee salaries were $500 Account Beginnng Balance Credit Adjusting Entries Credit Debit Debit Unadjusted Trial Balance Debit Credit $10,400 $5,500 $900 Adjused Trial Balance Debit Credit $10,400 $5,500 $300 $1,650 $11,000 $500 Cash Accounts Receivable Baking Supplies Prepaid Insurance Equipment Accumulated Deprec. $600 $1,650 $11,000 $500 $400 Accounts Payable Salaries Payable Bank Loan $500 $400 $500 $5,500 $5,500 $20,000 $20,000 Common Stock Retained Earnings Dividends $8001 $800 $6,700 $6,700 $500 Service Revenue Gas & Oil Expense Baking Supplies Expense Depreciation Expense Insurance Expense Salaries Expense $6001 $500 $500 $600 $500 $150 $2,200 $33,600 $1,650 $1,800 $1,700 $32,600 $500 $3,250 $0 $0 $32,600 $3,250 $33.600 Happy House Bakeshop opened for business on October 1, 2018. During the month of October, the following transactions occurred: October 1: Issued $20,000 of common stock for $20,000 cash. October 1: Purchased a delivery van for $11,000. Paid $4,000 in cash and borrowed the remainder (long-term) from the bank. October 3: Purchased baking supplies for $900 on account. October 5: Paid $1,800 on a one-year insurance policy, effective October 1. October 12: Billed customers $4,800 for baking services. October 18: Paid $1,500 of the amount owed on the van. October 18: Paid $500 of the amount owed on baking services. October 20: Paid $1,700 for employee salaries. October 21: Collected $1,200 from customers billed on October 12. October 25: Billed customers $1,900 for baking services. October 31: Paid gas and oil for the month on the delivery, $500. October 31: Paid an $800 dividend. Adjustments: (a) Earned but unbilled fees at October 31 were $2,500 (b) Depreciation for the month was $500 (c) One-twelfth of the insurance expired (d) An inventory count showed $300 of cleaning supplies remaining on October 31 (e) Accrued but unpaid employee salaries were $500 Account Beginnng Balance Credit Adjusting Entries Credit Debit Debit Unadjusted Trial Balance Debit Credit $10,400 $5,500 $900 Adjused Trial Balance Debit Credit $10,400 $5,500 $300 $1,650 $11,000 $500 Cash Accounts Receivable Baking Supplies Prepaid Insurance Equipment Accumulated Deprec. $600 $1,650 $11,000 $500 $400 Accounts Payable Salaries Payable Bank Loan $500 $400 $500 $5,500 $5,500 $20,000 $20,000 Common Stock Retained Earnings Dividends $8001 $800 $6,700 $6,700 $500 Service Revenue Gas & Oil Expense Baking Supplies Expense Depreciation Expense Insurance Expense Salaries Expense $6001 $500 $500 $600 $500 $150 $2,200 $33,600 $1,650 $1,800 $1,700 $32,600 $500 $3,250 $0 $0 $32,600 $3,250 $33.600