incremental sum in new collumn

[martijnth]

Dear All, it's Friday and I'am not able to solve the following in DAX; i want to create a new collumn where each value is the previous value in [incr x] plus the next value of [ delta x].  thx in advance Delta X Incr X 1.33 1.33 5 6.33 6 12.33 10 22.33 12 34.33 7 41.33 8 49.33 11 60.33 9 69.33 11 80.33

[martijnth]

for better understanding the challenge