Base 60 Transmutation Table

I wrote an Excel Spreadsheet grading table that references a Base60 Transmutation Table.

Here's the lookup table that I used for the grading sheet. The top column shows the total number of Items. The first column on the left is the equivalent final grade (1 being the highest, 5 the lowest). The second column from the left is the equivalent grade in percentage.

	%	100	90	80	70	60	50	40	30	20	10
5	60	0	0	0	0	0	0	0	0	0	0
	60	1	1	1	1	1	1	1
	60	2	2	2	2
	60	3
	61	4	3	3	3	2	2	2	1	1
	61	5	4	4	4	3	3		2
	61	6	5	5	5	4
	61	7	6
	62	8	7	6	6	5	4	3	3	2	1
	62	9	8	7	7	6	5	4
	62	10	9	8	8
	62	11	10	9
	63	12	11	10	8	7	6	5	4	3
	63	13	12	11	9	8	7	6
	63	14	13	12	10	9
	63	15
	64	16	14	13	11	10	8	7	5
	64	17	15	14	12	11	9
	64	18	16	15	13
	64	19	17		14
	65	20	18	16	14	12	10	8	6	4	2
	65	21	19	17	15	13	11	9
	65	22	20	18	16
	65	23	21
	66	24	22	19	17	14	12	10	7	5
	66	25	23	20	18	15	13		8
	66	26	24	21		16
	66	27
	67	28	25	22	19	17	14	11	9	6	3
	67	29	26	23	20	18	15	12
	67	30	27	24	21
	67	31		25
	68	32	28	26	22	19	16	13	10	7
	68	33	29	27	23	20	17	14
	68	34	30	28	24	21
	68	35	31
	69	36	32	29	25	22	18	15	11
	69	37	33	30	26	23	19
	69	38	34	31	27
	69	39	35
4	70	40	36	32	28	24	20	16	12	8	4
	70	41	37	33	29	25	21	17
	70	42	38	34	30
	70	43	39
	71	44	40	35	31	26	22	18	13	9
	71	45	41	36	32	27	23
	71	46	42	37		28
	71	47
	72	48	43	38	33	29	24	19	15	10	5
	72	49	44	39	34	30	25	20
	72	50	45	40
	72	51		41
	73	52	46	42	36	31	26	21	16	11
	73	53	47	43	37	32	27	22
	73	54	48	44	38	33
	73	55	49
	74	56	50	45	39	34	28	23	17
	74	57	51	46	40	35	39
	74	58	52	47	41
	74	59	53
3	75	60	54	48	42	36	30	24	18	12	6
	76	61	55	49	43	37	31
	76	62	56				32
2.75	77	63	57	50	44	38	33	25	19	13
	77	64	58	51	45
	78	65	59	52	46	39		26	20
	79	66	60	53	47	40
	79	67
2.5	80	68	61	54	48	41	34	27	21	14	7
	80	69	62	55
	81	70	63	56	49	42	35	28
2.25	82	71	64	57	50	43	36	29	22	15
	82	72	65
	83	73	66	58	51	44	37	30
	83	74	67	59	52
	84	75	68	60	53	45
2	85	76	69	61	54	46	38	31	23	16	8
	85	77
	86	78	70	62	55	47	39	32	24
	86	79	71	63
	87	80	72	64	56	48	40
1.75	88	81	73	65	57	49	41	33	25	17
	88	82	74
	89	83	75	66	58	50	42	34
	89	84		67	59
	90	85	76	68	60	51
1.5	91	86	77	69	61	52	43	35	26	18	9
	91	87	78
	92	88	79	70	62	53	44	36	27
	92	89	80	71
	93	90	81	72	63	54	45
1.25	94	91	82	73	64	55	46	37	28	19
	94	92	83
	95	93	84	74	65	56	47	38
	95	94	85	75	66
	96	95	86	76	67	57
1	97	96	87	77	68	58	48	39	29	20	10
	97	97
	98	98	88	78	69	59	49	40	30
	98	99	89	79
	99	100	90	80	70	60	50