math
posted by Katherine .
you have one penny one nickel one dime and one quarter. how many different amounts of money can you make using one or more of these coins ... please help..me..:(

P
PN
Pq
Pd
PND
PNQ
PDQ
PNDQ
QND
QD
QN
ND
N
D
Q
Are there any more? 
seven +eight=twelve
what is the answer without repeating