need help producing a trail balance and a for the month end july31,2008

Data: Lee Chang opened Chang's Cleaning Service, Inc. on July 1, 2008. During July the following transactions occurred: July 1: Chang invested $20,000 cash in the business. July 1: Purchased a used truck for $9.000, paying $4,000 cash & the balance on account. July 3: Purchased cleaning supplies for $2,100 on account. July 5: Paid $1,800 cash for a one-year insurance policy effective July 1. July 12: Billed customers $4,500 for cleaning services. July 18: Paid $1,500 cash on amount owed on truck and $1,400 on amount owed on cleaning supplies (you may do one entry for the combined transaction or two single ones). July 20: Paid $2,000 cash for employee salaries. July 21: Collected $3,400 cash from customers billed in Transaction #5 July 25: Billed customers $9,000 for cleaning services. July 31: Paid gas & oil for monthly on the truck, $350 July 31: Withdrew $1,600 AS A DIWO ENO