$arr = array(
"I4" => 7 , "I3" => 7 ,
"I2" => 7 , "I1" => 8 ,
"B4" => 8 , "B3" => 8 ,
"B2" => 8 , "B1" => 9 ,
"S4" => 10 , "S3" => 10 ,
"S2" => 10.50 , "S1" => 12 ,
"G4" => 15 , "G3" => 15.50 ,
"G2" => 16 , "G1" => 17 ,
"P4" => 27 , "P3" => 28 ,
"P2" => 30 , "P1" => 35 ,
"D4" => 70 , "D3" => 80 ,
"D2" => 120 , "D1" => 180
);