Royal Dutch Shell PLC (NYSE: RDS-B) posted a 12.7% drop in its adjusted profit for the second quarter. Royal Dutch Shell's clean current cost of supplies fell to $5.72 billion, from $6.55 billion in the year-ago quarter, versus analysts' estimates of $6.46 billion. Its total oil and gas production gained 1.9% to 3.103 million barrels of oil equivalent per day. Its quarterly net profit declined 53.1% y/y to $4.06 billion, from $8.66 billion. Group revenue dropped to $119.89 billion, from $124.56 billion. Its diluted earnings per share declined to 65 cents, from 139 cents. Shell also announced its plans to lift its dividend by 2.4% to 43 cents per share. Royal Dutch Shell shares closed at $70.40 yesterday.