partnership account

As partner had continued to firm since last many year so he/she must have contributed to firm in the form of money and generation of value (i.e. goodwill)

at the time of retirement he/she must be paid for capital balance and calculated goodwill amount the benefit of which will be enjoyed by continuing partners

hence good is added along with closing capital balances 

Note : it is assumed that praportionate share of goodwill is also in capital balance of retiring partner