{"pre_text": ["the discount rate assumption was determined for the pension and postretirement benefit plans independently .", "at year-end 2011 , the company began using an approach that approximates the process of settlement of obligations tailored to the plans 2019 expected cash flows by matching the plans 2019 cash flows to the coupons and expected maturity values of individually selected bonds .", "the yield curve was developed for a universe containing the majority of u.s.-issued aa-graded corporate bonds , all of which were non callable ( or callable with make-whole provisions ) .", "historically , for each plan , the discount rate was developed as the level equivalent rate that would produce the same present value as that using spot rates aligned with the projected benefit payments .", "the expected long-term rate of return on plan assets is based on historical and projected rates of return , prior to administrative and investment management fees , for current and planned asset classes in the plans 2019 investment portfolios .", "assumed projected rates of return for each of the plans 2019 projected asset classes were selected after analyzing historical experience and future expectations of the returns and volatility of the various asset classes .", "based on the target asset allocation for each asset class , the overall expected rate of return for the portfolio was developed , adjusted for historical and expected experience of active portfolio management results compared to the benchmark returns and for the effect of expenses paid from plan assets .", "the company 2019s pension expense increases as the expected return on assets decreases .", "in the determination of year end 2014 projected benefit plan obligations , the company adopted a new table based on the society of actuaries rp 2014 mortality table including a generational bb-2d projection scale .", "the adoption resulted in a significant increase to pension and other postretirement benefit plans 2019 projected benefit obligations .", "assumed health care cost trend rates have a significant effect on the amounts reported for the other postretirement benefit plans .", "the health care cost trend rate is based on historical rates and expected market conditions .", "a one-percentage-point change in assumed health care cost trend rates would have the following effects : one-percentage-point increase one-percentage-point decrease effect on total of service and interest cost components .", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", "$ 5943 $ ( 4887 ) effect on other postretirement benefit obligation .", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", "$ 105967 $ ( 86179 ) ."], "post_text": ["the discount rate assumption was determined for the pension and postretirement benefit plans independently .", "at year-end 2011 , the company began using an approach that approximates the process of settlement of obligations tailored to the plans 2019 expected cash flows by matching the plans 2019 cash flows to the coupons and expected maturity values of individually selected bonds .", "the yield curve was developed for a universe containing the majority of u.s.-issued aa-graded corporate bonds , all of which were non callable ( or callable with make-whole provisions ) .", "historically , for each plan , the discount rate was developed as the level equivalent rate that would produce the same present value as that using spot rates aligned with the projected benefit payments .", "the expected long-term rate of return on plan assets is based on historical and projected rates of return , prior to administrative and investment management fees , for current and planned asset classes in the plans 2019 investment portfolios .", "assumed projected rates of return for each of the plans 2019 projected asset classes were selected after analyzing historical experience and future expectations of the returns and volatility of the various asset classes .", "based on the target asset allocation for each asset class , the overall expected rate of return for the portfolio was developed , adjusted for historical and expected experience of active portfolio management results compared to the benchmark returns and for the effect of expenses paid from plan assets .", "the company 2019s pension expense increases as the expected return on assets decreases .", "in the determination of year end 2014 projected benefit plan obligations , the company adopted a new table based on the society of actuaries rp 2014 mortality table including a generational bb-2d projection scale .", "the adoption resulted in a significant increase to pension and other postretirement benefit plans 2019 projected benefit obligations .", "assumed health care cost trend rates have a significant effect on the amounts reported for the other postretirement benefit plans .", "the health care cost trend rate is based on historical rates and expected market conditions .", "a one-percentage-point change in assumed health care cost trend rates would have the following effects : one-percentage-point increase one-percentage-point decrease effect on total of service and interest cost components .", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", "$ 5943 $ ( 4887 ) effect on other postretirement benefit obligation .", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", ".", "$ 105967 $ ( 86179 ) ."], "table": [["", "one-percentage-point increase", "one-percentage-point decrease"], ["effect on total of service and interest cost components", "$ 5943", "$ -4887 ( 4887 )"], ["effect on other postretirement benefit obligation", "$ 105967", "$ -86179 ( 86179 )"]], "table_ori": [["", "One-Percentage-Point Increase", "One-Percentage-Point Decrease"], ["Effect on total of service and interest cost components", "$5,943", "$(4,887)"], ["Effect on other postretirement benefit obligation", "$105,967", "$(86,179)"]]}

Question: what was the net effect of the one percentage point change on the other post retirement benefit obligations combined
Evidence:
table_2: the effect on other postretirement benefit obligation of one-percentage-point increase is $ 105967 ; the effect on other postretirement benefit obligation of one-percentage-point decrease is $ -86179 ( 86179 ) ;
Program: add(105967, -86179)
Answer:
str_answer: 19788
exe_answer: 19788