diff --git a/ec2-cost-calculate-ruby/ec2cc-mysql/ec2cc-table-create.sql b/ec2-cost-calculate-ruby/ec2cc-mysql/ec2cc-table-create.sql
index 548633b..8559092 100644
--- a/ec2-cost-calculate-ruby/ec2cc-mysql/ec2cc-table-create.sql
+++ b/ec2-cost-calculate-ruby/ec2cc-mysql/ec2cc-table-create.sql
@@ -14,7 +14,7 @@ CREATE  TABLE IF NOT EXISTS `ec2cc`.`costs` (
   `platform` VARCHAR(7) NOT NULL ,
   `instance_type` VARCHAR(13) NOT NULL ,
   `status` VARCHAR(7) NOT NULL ,
-  `cost` FLOAT NOT NULL ,
+  `cost` DECIMAL(10,4) NOT NULL ,
   `name` VARCHAR(40) NULL ,
   `autoscalinggroup` VARCHAR(40) NULL ,
   `date` DATETIME NOT NULL )
diff --git a/ec2-cost-calculate-ruby/ec2cc-mysql/ec2cc.mwb b/ec2-cost-calculate-ruby/ec2cc-mysql/ec2cc.mwb
index 246552c..191a4af 100644
Binary files a/ec2-cost-calculate-ruby/ec2cc-mysql/ec2cc.mwb and b/ec2-cost-calculate-ruby/ec2cc-mysql/ec2cc.mwb differ