A certain charity organization is selling magazine subscriptions to increase money for their cause. The number of magazine subscriptions, M(t), that each member is anticipated to sell is a function of the number of years, t, that they've been with organization, and the function is given as M(t) = 5t + 2. The amount of profit in dollars earned by the charity, P(m), is a function of the number of magazines, m, that a member sells and is given as P(m) = 0.80m. Find the function, P(t), that determines the amount of profit that is expected from a member who was been with the organization for t years.