round equations to the largest value in a list

[aschiaratura1]

Hello. i'm working on a dynamic block for my office, we made HVAC implants and i'd like to set the value of an equation to the bigger value next to it.

for example the section A plus the section B give me a resoult of 435mm but me make only 45omm pipes so i'd like my block change to that value once i had insert the A e B section.

[h_s_walker]

@aschiaratura1 Create a field with a formula and in the formula put

ROUND(((A+B)/50)+.499)*50

A and B are obviously your values. The above formula rounds to the values you specify in the divide and multiply, in this case I assume your pipes are in lengths of 50

See the attached drawing for a quick and dirty example

[j.palmeL29YX]

Which are the allowed values for your pipes (obviously 450 is one of them)? 

Is it a list with a constant increment or ...? 

And post your block please, so we can see what is A and B, which equation you're talking about,  where are the current values for A and B coming from  and other details.