Price of diamond P	Quantity of diamonds Q	Total revenue TR = P × Q	Marginal revenue MR = ΔTR/ΔQ
$1,000	0	$0
			$950
950	1	950
			850
900	2	1,800
			750
850	3	2,550
			650
800	4	3,200
			550
750	5	3,750
			450
700	6	4,200
			350
650	7	4,550
			250
600	8	4,800
			150
550	9	4,950
			50
500	10	5,000
			−50
450	11	4,950
			−150
400	12	4,800
			−250
350	13	4,550
			−350
300	14	4,200
			−450
250	15	3,750
			−550
200	16	3,200
			−650
150	17	2,550
			−750
100	18	1,800
			−850
50	19	950
			−950
0	20	0