I just need help solving "Loan requirement for cash surplus cash at start of month" and "Cumulative Cash". I just need to see where those numbers are coming from

Helen Bowers, owner of Helen's Fashion Designs, is planning to request a line of credit from her bank. She has estimated the following sales forecasts for the firm for parts of 2019 and 2020:

	May 2019	$186,000
	June	186,000
	July	372,000
	August	540,000
	September	720,000
	October	360,000
	November	360,000
	December	90,000
	January 2020	180,000

Estimates regarding payments obtained from the credit department are as follows: collected within the month of sale, 10%; collected the month following the sale, 75%; collected the second month following the sale, 15%. Payments for labor and raw materials are made the month after these services were provided. Here are the estimated costs of labor plus raw materials:

	May 2019	$90,000
	June	90,000
	July	126,000
	August	883,000
	September	306,000
	October	234,000
	November	163,000
	December	90,000

General and administrative salaries are approximately $27,000 a month. Lease payments under long-term leases are $9,000 a month. Depreciation charges are $36,000 a month. Miscellaneous expenses are $2,700 a month. Income tax payments of $63,000 are due in September and December. A progress payment of $180,000 on a new design studio must be paid in October. Cash on hand on July 1 will be $132,000, and a minimum cash balance of $90,000 should be maintained throughout the cash budget period.

1. Prepare a monthly cash budget for the last 6 months of 2019. If no entry required, enter "0" or leave it blank. All payments and expenses should be entered as positive numbers. Cash losses, negative cash balance, negative cumulative cash, and cumulative loans outstanding, if any, should be indicated by a minus sign. Round your answers to the nearest dollar, if necessary.

   May

   June

   July

   August

   September

   October

   November

   December

   January

   Collections and purchases worksheet

   Sales (gross)

   Collections

   During month of sale

   During 1st month after sale

   During 2nd month after sale

   Total collections

   Purchases

   Labor and raw materials

   Payments for labor and raw materials

   Cash gain or loss for month

   Collections

   Payments for labor and raw materials

   General and administrative salaries

   Lease payments

   Miscellaneous expenses

   Income tax payments

   Design studio payment

   Total payments

   Net cash gain (loss) during month

   Loan requirement or cash surplus

   Cash at start of month

   Cumulative cash

   Target cash balance

   Cumulative surplus cash or loans outstanding to maintain $90,000 target cash balance