Why do I need to use present vale of an ordinary annuity for below question?

Jenks Company financed the purchase of a machine by making payments of $10, 000 at the end of each of 5 years. The appropriate rate of interest was 8%. The future value of 1 for 5 periods at 8% is 1.46933. The future value of an ordinary annuity for 5 periods at 8% is 5.8666. The present value of an ordinary annuity for 5 periods at 8% is 3.99271. What was the cost of the machine to Jenks? $14, 794. $39, 927. $50, 000. $58, 667