Step 1 :First, we need to calculate the total amount of money Gary will receive over the 6 years by integrating the function \( P(t) = 120,000 - 20,000t \) over the interval \( [0,6] \).
Step 2 :Next, we apply the formula for continuous compounding to find the final value of the account after 6 years, using the rate of \( 4.67\% \) or \( 0.0467 \) as a decimal.
Step 3 :The final value of the account after 6 years, with continuous compounding, is calculated to be \( 476422.0073151354 \).
Step 4 :We round the final value to the nearest dollar to get \( \boxed{476422} \).