The following transactions occurred during June: June 1 Purchased two new maintenance carts (noncurrent assets) on account at $750 each. Payment is due in 30 days. June 8 Accepted $500 of advance payments from customers for services to be provided next month. June 15 Received the June utility bill for $300. Payment is due and made in 30 days. June 20 Billed customers for $1,500 services provided. Payment is due in 30 days. June 30 Received $500 from customers who were billed on June 20. What journal entry is required to record the purchase of the carts on June 1