When you want to form the sentence using “per” in Thai language, you have to say it backward.
The word ‘per’ in Thai is ละ / lá /
 English structure: 50 Baht per day
Thai structure : day per 50 Baht
วันละ 50 บาท /wan lá 50 bàad /
– day in Thai is วัน /wan/
 English structure : 200 Baht per hour
Thai structure : hour per 200 Baht
ชั่วโมงละสองร้อยบาท /chûa-moong lá 200 Baht/
– hour in Thai is ชั่วโมง /chûa-moong/
 English structure : 3 days per week
Thai structure : week per 3 days
อาทิตย์ละสามวัน /aa-tít lá 3 wan/
– week in Thai is อาทิตย์ /aa-tít/
 English structure : How much per hour?
Thai structure : hour per How much?
ชั่วโมงละเท่าไหร่ /chûa-moong lá tâo-rài/
– How much in Thai is เท่าไหร่ / tâo-rài/
It is very easy, isn’t it? You just have to remember to say it backward! : )
How to say the price like a Thai
1,200 is nùeng pan sŏrng rói. In spoken Thai, the word ‘nùeng’ and the last unit are dropped so we only say pan sŏrng
17,000 is nùeng mùen jèt pan. In spoken Thai it is mùen jèt
430,000 is sìi săen săam mùen. In spoken Thai it is sìi săen săam
9,600,000 is gâao láan hòk săen. In spoken Thai it is gâao láan hòk