Purchase of 8,000kg of raw materials for warehousing with the tax-exclusive purchase price of VND50,000kg VAT 10 has not yet been paid to the seller. The cost of transporting enterprises in cash is 2,520,000 VND including 5 VAT. If the business pays within 10 days, they will receive a payment discount of 5 on the selling price excluding VAT.

Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is