Calculating Row wise differences

[ksasidhars]

Can any of you please let me know how can I achieve the row wise differences. Please check the example be;low

Already tried posting the message couple of hours back, but couldn't understand why it is not displayed.- Thanks

Name	Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Total
Row I		29951.72	8800	40674.92	74612.46	-16337.54	25276.65	100	9388.71	14383	22162	16099	41760	266870.92
Row II		29659.82	29659.82	29659.82	29659.82	29659.82	29659.82	30969.85	30969.85	30969.85	30969.85	30969.85	30969.85	363778.02
Difference

- Sasi