Kala

Ltd is an Irish resident company. Its recent results are as follows:

	Year ended	Period ended	Year ended
	31 December 2018	30 June 2019	30 June 2020
Case I profit/(loss)	400,000	700,000	(1,000,000)
Case III	35,000	50,000	(42,000)
Case IV	8,200	(1,500)	3,500
Case V profit/(loss)	3,000	(4,000)	5,000
Capital gains/(losses)	(15,000)	9,000	8,000
Development land gains	10,000	0	50,000
Trade Charges	(3,000)	0	0

Notes

1. The capital gains/(losses) noted above are the actual capital gains and losses and have not been adjusted. These transactions related to disposals of shares that did not derive their value from development land.
2. The development land gains of 10,000 and 50,000 arose on two sales of development land in June 2018 and April 2020 respectively.
3. The trade charges relate to the purchase of a patent royalty that was used for the purpose of the Case I trade.
4. Unutilised trading losses from the Case I trade at 1 January 2018 were 10,000.

Required

Calculate the corporation tax payable by the company for each period on the basis that full relief is claimed for all available losses at the earliest opportunity. As part of your answer, clearly explain your treatment of the development land gains.