seller will issue statement to buyer each month and or day,as the case may be
buyer will require an invoice for payment of the parts seller shall therefore, invoice buyer the applicable prices of the parts delivered by seller to buyer in a mutually agreeable format in the same day on the date of the relevant delivery in principle
subject to a correct invoice being received by buyer under the above provision, buyer will pat seller the invoice amount by the end of the second month after the month which buyer has received such invoice