What are the various methods of demand forecasting? How can we adapt those methods to specific project types?

What do economists mean when they use the latin expression ceteris paribus?

"in my opinion, we ought to stop making our own drums and accept that outside supplier's offer," said wim niewindt, managing director of antilles refining, n.v., of aruba. "at a price of $21 per drum, we would be paying $4.70 less than it costs us to manufacture the drums in our own plant. since we use 70,000 drums a year, that would be an annual cost savings of $329,000." antilles refining's current cost to manufacture one drum is given below (based on 70,000 drums per year):

On june 1, 2017, blossom company was started with an initial investment in the company of $22,360 cash. here are the assets, liabilities, and common stock of the company at june 30, 2017, and the revenues and expenses for the month of june, its first month of operations: cash $4,960 notes payable $12,720 accounts receivable 4,340 accounts payable 840 service revenue 7,860 supplies expense 1,100 supplies 2,300 maintenance and repairs expense 700 advertising expense 400 utilities expense 200 equipment 26,360 salaries and wages expense 1,760 common stock 22,360 in june, the company issued no additional stock but paid dividends of $1,660. prepare an income statement for the month of june.