Looking to sum up items in a child table that meet criteria of a field in the child record ( sum of unapproved invoices , etc.. ) ideas.?

I need to count working hours in the range defined by "Start" and "End" fields. Both fields are Date and Time format. The working day lasts from 7 AM till 3:30 PM. I need to count time only from this range. Overtime and weekends should not be included. I can start and end work any day at any time.
weekdays() function counts only days, datedif() function includes all 24 hours and weekends.
Any ideas?

I am looking for a way to capture how long it takes a user to create a record.
Does TrackVia stamp when a Form is opened? If so, then I can use this value in a datedif formula against the record Create Date/Time to see how long it took to open the form, key in the information, and click Save.

In most languages you can add comments that does not affect the code or formula. Out of habit I tried to use ' but that didn't seem to work. Does trackvia allow for this kind of thing and if so what is the symbol or text?

E.g.

If({Field} = 1, A + B, A + C)

'comments about above statement

We use TrackVia as a check register, and need a warning message that says "Are you sure you want to allow Sum of Balance value to change?"

Hi we have a table that has calcualated fields, we are importing data into the table via API but the calculated fields are not calculating? Does anyone have an easy fix

Show a calculated date only using week days, so two days from Thursday would show the Monday's date, so today is Thursday the 13th July 2017, I want to show the calculation of two additional week days, so present Monday 17th July 2017

I am trying to calculate the number of working week-days from two dates, at the moment it is giving me the full 7 days per week.

I have child records with "Available" as a field. I want to count the number of records that contain "Yes" in that field and ignore the rest.

For example I want to show the percentage of total sales by store, salesperson etc.
Everything I have tried so far just returns 100% as it is only doing the calculation on a row by row basis rather than using the column total.

I have a view where I can see a client's Total Cost, Deposit they paid and their Remaining Balance (I have Balance set with the formula Total Cost - Deposit.) When a client wants to make a partial payment, how can I do that and have the Remaining Balance calculate that?

I have different prices per product and I want that on the product table the final price would be the lastest price introduce in the price table )child to product)

I would like to be able to calculate a total in a column, i.e. column shows amount of Disposition, would like a sum at the bottom showing the total of all those claims.

Can anyone please explain why this calculated text field formula works when Historic Order Number has a value but not when it's blank. I'm guessing it's something to do with the fact that Historic Order number is a text field whereas Order Number is an autonumber, however I can't find a to string function.

IF({Factory}="Toplink", "TLKNZ", IF({Factory}="Playmore", "PKNZ", IF({Factory}="Colaro", "CKNZ", IF({Factory}="Vithal", "VKNZ", "")))) & IF({Historic Order Number}="", {Order Number}, {Historic Order Number})

Is there a way to calculate Time, (not Base-10 numbers)?

I have a user who tracks Total Run Time (TRT) for TV Programming, and we need to sum/add the durations of multiple TRT's in the format of HH:MM:SS (Base 60).