Answer:
1. Cost of construction incurred
= Construction in progress - Income
= 150,000 - 25,000
= $125,000
2. Cash collected
= Billings - Accounts receivable
= 143,000 - 35,000
= $108,000
3. Estimated cost to complete;
= (Cost of construction incurred in 2016 * Contract price/Construction in progress) - Cost of construction incurred in 2016
= (125,000 * 2,100,000/150,000) - 125,000
= $1,625,000
4. Estimated percentage of completion used in 2016
= Cost of construction incurred in 2016 / (Cost of construction incurred in 2016 + Estimated cost to complete at end of 2016)
= 125,000 / ( 125,000 + 1,625,000)
= 125,000 / 1,750,000
= 0.0714
= 7.14%