CREATE TABLE table_17774 ("Sequencer" TEXT, "Ion Torrent PGM" TEXT, "454 GS FLX" TEXT, "HiSeq 2000" TEXT, "SOLiDv4" TEXT, "PacBio" TEXT, "Sanger 3730xl" TEXT)

How many times was Sanger 3730xl $2400 usd?
SELECT COUNT("Ion Torrent PGM") FROM table_17774 WHERE "Sanger 3730xl" = '$2400 USD'
SELECT COUNT("Ion Torrent PGM") FROM "table_17774" WHERE "Sanger 3730xl" = '$2400 USD'