Washington (AFP) – US plane maker Boeing reached a pair of major agreements on Monday with Qatar Airways, including the sale of 34 777X freighters worth an estimated $20 billion. Besides the 34 planes, Qatar Airways also has purchase rights for another 16 777X cargo planes, according to the agreement finalized at a White House signing ceremony. The Middle Eastern carrier also signed a letter of intent to buy 25 737 MAX planes worth $6.7 billion, the White House said. The announcement gives a boost to Boeing and its latest widebody plane the 777X, which saw its development pushed back amid the …