V pays 20 cents

V sells to W for 35 cents
W sells to X for 55 cents
X sells to Y for 80 cents
Y sells to Z for $1.00

Contribution to GDP:
(a) 20 cents
(b) $1.00
(c) $1.90
(d) $2.90

GDP is the total value of all FINAL goods and services. Go with b)