1. Show the mathematical steps
2. Show the effect on the I/s and the B/S
3. Prepare the adjusting entries.

*The records of Cairo firm show the following balances at the end of year 2019: Salaries and wages 3300 47000 Insurance Expense 55000 12000 Rent expense 19500 Electricity Expense 22000 48000 Given that: 1- monthly rent is 1500. 2- monthly salaries and wages 3000 3- earned services revenue 13000 4- monthly insurance is 5000 services revenue Commission revenue debit interest 4000 Advertising Expense 5- unearned commission revenue 2500 6- monthly electricity bill is 2000 7- monthly advertising expense 4000 Required: 1- show the mathematical steps 2- show the effect on I/s and B/S 3- prepare the adjusting entries.