Answer:

ADDED

Possible Questions:

- Put on
- To boot
- Additional
- Extra
- Further
- Totaled
- Threw in
- Put two and two together
- Increased
- Put in
- Tacked on
- Bonus
- Supplementary
- Appended
- Supplemented
- Contributed
- Kicked in
- Said further
- Did sums
- Annexed
- Tossed in
- Interjected
- Went on to say
- Type of attraction
- Produced a sum
- Inserted
- Thrown in
- Tallied
- Summed
- Put in one's two cents' worth
- Put 2 and 2 together
- Part of VAT
- Increased in size
- Included
- Hit the + key
- Gave as a bonus
- Calculated
- Used an abacus
- Used a calculator
- Tallied one's score
- Subjoined
- Stirred in
- Like a postscript
- Kind of attraction
- Included afterward
- Gained a band member
- Found a sum
- Did some simple arithmetic
- Combined, as numbers
- Came up with a sum
- ___ up (made sense)
- Wrote postscripts
- Wrote a P.S.
- Worked out a sum
- Value-___ (term that may signal a price hike)
- Totted up
- Totaled up
- Tossed into the mix
- Tallied up
- Suffixed
- Stated further
- Said also
- Said additionally
- Said further
- Put in, as your two cents' worth
- Pressed the calculator plus sign
- Part of V.A.T.
- Mixed in
- Made sense, with "up"
- Made calculations
- Like free shirt w/CD
- Like encores
- Like bonuses
- Like a certain attraction
- Inserted a rider
- Got the total
- Gained a background singer
- Found the sum
- Did the math
- Did sum work?
- Did sum work
- Did some arithmetic
- Determined the sum
- Built (on)
- Acquired some more