yogi_how to subtract only the decimal amount for multiple purchases per user specification

Google Spreadsheet   Post  #2578

Yogi Anand, D.Eng, P.E.      ANAND Enterprises LLC -- Rochester Hills MI     Jan-13-2019

question by: mystery82:
https://productforums.google.com/forum/?utm_medium=email&utm_source=best_answer_notification_button#!topic/docs/qCRsQHxs1wc;context-place=forum/docs
How do I subtract only the decimal amount?

I am trying to create a Budget sheet that puts the remaining change back into my available amount.

I have attached a link below that should explain everything I am trying to achieve there are graphics so it may load

slow.

Example:

https://docs.google.com/spreadsheets/d/1xlykW0OWK5gSQ4IMqLqoL8aopW9AVUWoZWLCwnW30_c/edit?usp=sharing