Ratios: GOOG (Alphabet Inc.)	Column1	Column2	Column3
	2018	2017	2016
Price/ Earnings	23.95	43.88	27.25
Enterprise Value / EBITDA	17.13	16.29	15.51
Market to Book Equity Ratio	0.0039	0.0045	0.0049
Enterprise Value / Book Assets	4.82	3.71	4.42
Total Asset Turnover	0.59	0.56	0.54
Receivables Turnover	6.46	5.94	6.31
Average Collection Period	56.48	61.49	57.89
Profit Margin	56.48%	58.88%	61.08%
Equity Multiplier	1.31	1.29	1.20
Return on Assets	0.13	0.06	0.12
Return on Equity	0.17	0.08	0.14

Ratios: AABA (Yahoo)	Column1	Column2	Column3
	2018	2017	2016
Price/ Earnings	(4.31)	3.19	(191.61)
Enterprise Value / EBITDA	(0.98)	0.91	45.76
Market to Book Equity Ratio	0.016	0.013	0.031
Enterprise Value / Book Assets	0.26	0.24	0.23
Total Asset Turnover	0.446	0.001	0.108
Receivables Turnover	1,630.69	4.86	4.48
Average Collection Period	0.22	75.15	81.40
Profit Margin	-42.56%	30364.71%	-4.14%
Equity Multiplier	1.35	1.30	1.55
Return on Assets	(0.190)	0.254	(0.004)
Return on Equity	(0.26)	0.33	(0.01)

Question: What are some weaknesses/caveats of the tables? Again, base your arguments on numbers, not just assertions.