The most apes use decimal currency. In most currencies, the largest currencies are 100 or 1,000. The smallest denominations is generally .01. One could have these denominations:

1,000.00
0,100.00
0,010.00
0,001.00
0,000.10
0,000.01

The denominations are far apart, thus making change difficult. Most countries use pseudonbinary:

1,000.00
0,500.00
0,250.00
0,100.00
0,050.00
0,025.00
0,010.00
0,005.00
0,002.00
0,001.00
0,000.50
0,000.25
0,000.10

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