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1a. AB = 30/ Tan 31 = 49.9m 
1b. First, find the height BD.
BC = tan37 · 49.9
      = 37.6
DC = BD - BC
BC = 37.6 - 30
BC= 7.6m (Is there a specific answer requirement like 3 sig. fig. or 2 decimal pt?)

2a) AC / sin 122 = 62 / sin 26
  Solve for AC and you will get AC = 120m 
2b) using cosine rule...
BC²= 55²+ 120² - 2(55)(120)(cos65)
BC = 108.8m
2c) Area of ACD = 0.5(120)(62)(sin32) = 1971.30m²
2d) 1971.3 × 4.50 = 8870.85 dollars

The answer for number 3 is in the picture: