Whether the reference of the 1PL pronoun in inclusive or exclusive is largely determined by context. The addition of the numeral two can make an inclusive reference explicit. In Example 36, the reference is exclusive. In Example 37, the reference is intended to be inclusive, and is marked as such by the addition of twe 'two'.
Source: Kouwenberg 1994a: 590
Source: Kouwenberg 1994a: 176