so doing some HW$.3$ multiple choice questions, all $3$ asking to calculate the true cash balance... all $3$ provided deposit in transit, outstanding checks, service charges, NFS checks, but the answers for all $3$ were as follow:

$1-$ $$10,500$ unadjusted book balance $$ $$40$ service charge $$ $$225$ NSF check $=$ $$10,235$ true cash balance

$2-$ $$4,070$ unadjusted bank balance $$ $$610$ outstanding checks $+$ $$470$ deposits in transit $=$ $$3,930$

$3-$ $$7,650$ unadjusted bank balance $+$ $$3,315$ deposits in transit $$ $$6,490$ outstanding checks $+$ $$570$ error correction $=$ $$5,045$ true cash balance.

if all $3$ are asking for the true cash balance, why some questions we take deposit in transit and outstanding checks into consideration? is there a universal formula to follow here? or it changes? very confused