Answer:
$2,775
Explanation:
The computation of the GDP of the economy is given below:
But before that the total value sold by three firms would be determined
Total amount of goods sold by X:
= X sells to Y + X sells to Z
= $150 + $75
= $225
Total amount of goods sold by Y:
= Y sells to X + Y sells to Z
= $200 + $50
= $250
Total amount of goods sold by Z:
= Z sells to X + Z sells to Y
= $300 + $250
= $550
Now
Amount of goods generated by X
= units of output × cost per unit
= 250 units × $4
= $1,000
Value of goods generated by Y
= units of output × cost per unit
= 300 units × $6
= $1,800
Value of goods generated by Z
= units of output × cost per unit
= 500 units × $2
= $1,000
Now GDP is
= [Goods generated by X - Valued added by X] + [Goods generated by Y - Value added by Y] + [Goods generated by Z - Value added by Z]
= [$1,000 - $225] + [$1,800 - $250] + [$1,000 - $550]
= $775 + $1,550 + $450
= $2,775
