Please help me to explain the detai

Please help me to explain the details below, to understand about the IFS systems payment schedule is after the invoice. But, in fact, the customers from the Billing , not the date on the tax invoice.
คำนวนจาก

ผลลัพธ์ (อังกฤษ) 1:

Please help me to explain the details below, to understand about the IFS systems payment schedule is after the invoice. But, in fact, the customers from the Billing , not the date on the tax invoice. Calculated from the

ผลลัพธ์ (อังกฤษ) 2:

Please help me to explain the details below, to understand about the IFS systems payment schedule is after the invoice. But, in fact, the customers from the Billing, not the date on the tax invoice.
Calculations from.

ผลลัพธ์ (อังกฤษ) 3:

Please help me to explain the details below to understand, about the IFS systems payment schedule is after the, invoice. ,, But in fact the customers from the Billing not the, date on the tax invoice.The calculated from.