Let us find the area for 830 bricks
14 ft 9 in =14. 75 ft
So 14.75 * 6 = 88.5 sq ft
The required wall square footage =
36 ft 6 in = 36.5 ft * 6ft = 219 sq ft
So...the number of bricks required for the new wall can be found by a proportion
N / 219 = 830 / 88.5 multiply both sides by 219
N = 219 * 830 / 88.5 ≈ 2054 bricks
It will take
[2054/ 300 ] hrs to construct the wall
And the hourly rate is 4000/8 = $500
So...the total cost ≈ [2054/ 300] * 500 = $ 3423.16
The third answer seems the closest [the difference is due to rounding by me ]
