Construction contracts

Hi Sir.

thank you for providing these free resources. we are very grateful.

I have been working through construction contracts.. and I was confused about a question I was doing.

L ltd builds equipment for the use in the building industry. each piece of equipment takes between one year and two to build so the entity is required to account for construction contracts.

the entity has 4 contracts in process at the end of year end 30th april x1

A B C D
Contract price 500 890 420 750
Work certified to date 375 534 280 –
Cost incurred to date 384 700 468 20
Estimated cost to complete 48 115 168 650
Progress billings 360 530 224 –

Prepare extracts of from the FS for each of the four projects- assuming revenue on the work certified basis

workings:

1. % completion on work certified basis
375/500 534/890 280/420 0/750
75% 60% 67% 0%

2. Use the above for the basis of the revenue calculation for the p&l
75%*500 60%*890 67%*420 0%*750
375 534 280 0

but in the answers contract D has revenue of 20? why is this? seems to be the same figure as the cost incurred to date. has it got something to do with the fact that the % completion on work certified basis is 0%? if the work has not been certified how can we recognize rev?

thanks in advance.