Every
setiap hari ‘every day’
setiap orang ‘everyone’
setiap pagi ‘every morning’
In speech this shortens to tiap, and tiap hari is what you will actually hear.
Each, separately
masing-masing means each one individually, and it usually comes after.
Kami bayar masing-masing. ‘We paid separately.’
That sentence is worth having ready. Splitting a bill is not the default in Indonesia, where one person often pays for the group, so saying it explicitly avoids an awkward moment.
Per
per hari ‘per day’
per orang ‘per person’
per malam ‘per night’
Borrowed and used exactly as in English. You will meet it constantly on accommodation prices.
Berapa per malam? ‘How much per night?’
The doubling shortcut
Doubling a number word turns it into a rate, which is a neat piece of the reduplication you met in A1.
dua-dua ‘two each’
satu-satu ‘one at a time’
Masuk satu-satu. ‘Go in one at a time.’
Both
keduanya ‘both of them’
kedua-duanya same, more emphatic
Saya suka keduanya. ‘I like both.’
The ke- here makes an ordinal: kedua on its own is ‘second’. Attached to -nya it becomes ‘the two of them’.
Neither
There is no single word. You negate instead.
Dua-duanya tidak. ‘Neither of them.’
Tidak ada yang saya suka. ‘I don’t like any of them.’
That second one uses yang from the joining chapter, doing exactly the job it was built for.