Can Anyone Help Me with This Accounting Journal Entry?

I understand a lot of how to do this, but I'm still new with it and need a little help with this journal entry. It is just more of a practice question, but I keep getting confused on how to put it all in the journal.
During its first month of operation, the Truman's Repair Co., which specializes in engine repairs completed the following transactions:
Feb. 1
began business by making a deposit in a company bank account of $12,000, in exchange for 1,200 shares of $10 par value common stock
Feb. 3
Purchased repair equipment from Aster's Company, $4,400. Paid $600 down and the balance was placed on account. Payments will be $200.00 per month for nineteen months. The first payment is due 11/1.
Feb. 8
purchased repair supplies from Kelly Company on credit, $390.
Feb. 16
Cash engine repair revenue for the first half of October, $1,362.
Feb. 19
Made payment to Kelly Company, $200.
Feb. 31
Cash engine repair revenue for the last half of October, $1,310
Feb. 31
Declared and paid cash dividend of $800.

Suggestion:

Feb. 1
began business by making a deposit in a company bank account of $12,000, in exchange for 1,200 shares of $10 par value common stock
Dr Cash $12,000
Cr Common stock $12,000

Feb. 3
Purchased repair equipment from Aster's Company, $4,400. Paid $600 down and the balance was placed on account. Payments will be $200.00 per month for nineteen months. The first payment is due 11/1.
Dr Repair equipment $4,400
Cr Cash $600
Cr Accounts payable $3,800

Feb. 8
purchased repair supplies from Kelly Company on credit, $390
Dr Repair supplies $390
Cr AP $390

Feb. 16
Cash engine repair revenue for the first half of October, $1,362
Dr Cash $1,362
Cr Repair revenue $1,362
(If the 1st month of operations is Feb, what is Oct doing here?)

Feb. 19
Made payment to Kelly Company, $200
Dr AP $200
Cr Cash $200

Feb. 31 (which calendar has Feb 31?)
Cash engine repair revenue for the last half of October, $1,310
Dr Cash $1,310
Cr Repair revenue $1,310

Feb. 31
Declared and paid cash dividend of $800
Dr Dividend $800
Cr Cash $800

Tagged as: began business by making a deposit in a company bank account of $12,000, in exchange for 1,200 shares of $10 par value common stock., began business by making a deposit in a company bank account of $12,000, in exchange for 1,200 shares of $10 par value common stock. is this a debit or credit, solve for journal entry. began business by making a deposit in a company bank account of $12,000, in exchange for 1,200 shares of $10 par value common stock.