newbie - add 15 to number in list

Hi there,

I am outputing a list of 10 values.

10, 20, 30, 40, etc

I can add 15 to one of the values then reorder the values from smallest
to highest but i want to update every single value and assign it values
increamenting by 10

so after the update the second number of 20 and add 15 I get

10, 30, 35, 40

now i want to re output the values above as

10, 20, 30, 40

can someone please help.

.