Prepare Journal Entries in a Purchases Journal Sentry Security Company had the following transactions during the month of January: Jan. 4. Purchased office supplies from Office Universe Inc. on account, $540 9. Purchased office equipment on account from Tek Village, Inc., $2,140 16. Purchased office supplies from Office Universe Inc. on account, $150 21. Purchased office supplies from Paper-to-Go Inc. on account, $220 27. Paid invoice on January 4 purchase from Office Universe Inc. a. Prepare a purchases journal to record the January purchase transactions for Sentry Security Company. If an amount box does not require an entry, leave it blank. If no entry is required in "Other Accounts Dr." then select "No entry required". PURCHASES JOURNAL Account Credited Post. Ref Accounts Payable Cr Office Supplies Dr Other Accounts Dr Post. Ref DATE Jan. 4 Jan. 9 Amount Select Select Select Select Jan. 16 Jan. 21 Jan. 31 Select Select Select Select Total b. What is the total amount posted to the accounts payable and office supplies accounts from the purchases journal for January? Credit to accounts payable Debit to office supplies c. What is the January 31 balance of the Office Universe Inc. creditor account assuming a zero balance on January 1