Code:
$cat File1.csv
1979181218.70,2039088797.84,48864040.62,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00
1573820407.52,1536377096.18,673980681.96,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00
405360811.18,502711701.66,625116641.34,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00
$cat File2.csv
1979181218.70,2039088797.84,48864040.62,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00
1573820407.52,1536377096.18,673925056.96,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00
405360811.18,502711701.66,625061016.34,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00,0.00