The amount of the PBO at December 31, 2021, was $333800
<u>Explanation:</u>
The amount of PBO at december 31st is calculated as follows:
PBO on jan 1, 2021 = $268000
add: Service cost = $86000
add: interest = $26800
less: pension benefits that have been paid = $47000
now, we have to solve the above calculation
we get, PBO at dev 31 = $333800
Note: interest is calculated by multiplying the PBO amount on Jan 1,2021 with the rate of interest given.
Thus, $268000 multiply 10% = $26800