accrual based profit

Good day,

spent a lot of time looking for a solution, but no luck

I have a table with the following data 

Client    Date_begin        Date_end            Termination_date          Sales$

AAA       01.06.2021          31.05.2022                                                   500

BBB        01.01.2022          31.12.2022                                                   400

BBB                                                                       30.04.2022              -100

CCC        03.05.2022          02.08.2022                                                   100

(today()-sum(Table[date_end]))/(in sales$ column negative sales mean refund, in case refund made all sales are considered earned on an accrual basis)


What i am trying to do

1. add a column (accual_coeff) with the following formula
if there exists data in termination_date, 1, otherwise 

(sum(Table[date_end])-sum(Table[date_begin]))
2. Add a measure that is the multiplication of accrual_coeff and Sales$

As a result i'd have

Client    Sales$   accural coeff      Accued Profit

AAA       500         0.97                        483.5

BBB        300         1.00                        300.0

CCC        100         0.18                        17.6

I can't do it in power query by grouping, since this table is a small part of a big table, and i am going to use with multiple other combinations
Any help would be greatly appreciated