Answer:
1. $28,000
2. $20,000
3. $18,000
4. $1,000
Step-by-step explanation:
(1) Provided catering services for cash $28,000 
It affects the cash balance negatively while affecting the retained earning balance positively. 
(2) Purchase of land for cash $20,000 
It affects the cash balance negatively while affecting the land balance positively. 
(3) Payment of expenses $18,000 
It affects the cash balance negatively while affecting the retained earning balance positively. 
(4) Payment of cash dividends $1,000 
It affects the cash balance negatively while affecting the retained earning balance positively.