PLEASE ANSWER ALL 3 QUESTIONS.. THANKS

On January 1, 2017, Carly Fashions Inc. enters into a contract with a regional retail company to provide 500 blouses for $20,000 over the next 10 months. On September 1, 2017, after 400 of the blouses had been delivered (50 blouses per month), the contract is modified.

1. Fifty blouses were delivered each month for the first 8 months of 2017. Prepare Carly Fashionss monthly journal entry to record revenue.
2. Assume that the contract is modified on September 1 to sell, once the original 500 blouses are delivered, an additional 100 blouses at $35 per blouse, which is the stand-alone selling price on October 1, 2017. The additional blouses are to be delivered in November. Prepare the November journal entry to record the contract modification.
3. Assume instead that the contract is modified on September 1 to alter the price of the additional 100 blouses to $35 per blouse, which is the stand-alone selling price on October 1, 2017. Assume the blouses are delivered evenly on September 1 and October 1, 2017. Prepare the journal entries for September and October to record this contract modification.