Let u be the number of units. We have a cost function C(u) as:

C(u) = Variable cost * u + Fixed Cost

C(u) = 14u + 100000

__We have a revenue function R(u) with u units as:__

R(u) = Sale Price * u

R(u) = 20u

__We have a profit function P(u) with u units as:__

Profit = Revenue - Cost

P(u) = R(u) - C(u)

P(u) = 20u - (14u + 100000)

P(u) = 20u - 14u - 100000

P(u) = 6u - 1000000