My CVS trip:

I did all of the Revlon nail polish in separate transactions so I could roll my ECB's.

Transaction #1:
Revlon nail polish -$4.99
used $1/1 MQ
=$3.99
used .75 previously earned ECB =$3.24 oop
got back $3 ECB

Transactions #2- #5:
Revlon nail polish -$4.99 ea.
used $1/1 MQ
=$3.99
used $3 ECB from previous transaction = .99 oop
got back $3 ECB

Transaction #6:
Gillette Mach 3 razor -$9.99
used $3/1 MQ
=$6.99
Right Guard antiperspirant -$2.99
used $1/1 MQ
=$1.99
total =$8.98
used $3 ECB from transaction #5 =$5.98 oop
got back $5 ECB & $1 ECB

Transaction #7:
(2) Almay mascara -$5.99 ea.
=$11.98
used $3 off any Almay purchase CVS red scanner machine coupon
+ used (2) $2/1 Almay MQ's
=$4.98
used $5 ECB from transaction #6 =$0 oop
got back $4 ECB

Grand total before coupons =$49.91
Grand total oop after coupons and ECB's =$13.93 -still have $4 & $1 ECB -like paying $8.93 for 9 items or .99 each!