IF Start UP COSTS new business and use OVERHEAD (what is included as overhead) and how do you put in the date incurred, do I have to do this in day by day increments? ?

equipment and travel etc.. ie: I bought equipment on several occasions, is each entered individually and other overhead entered separately even if it's $1599 1/2 and $220 on  1/ 9 or is it all combined as OVERHEAD $1819 on 1/3/202 ?