High and Low Points Method.  A transferee student from Manila is interested in analyzing the tuition fee and miscellaneous fee for the BSA program of National Teachers College (NTC) as related to number of units. The following data have been accumulated:

Number of Units	Tuition & Misc. Fees
6	4,550
12	6,830
15	7970
18	?
21	10250
27	12530

Required: 

1.      Determine the amount of the fixed miscellaneous fee and the variable tuition fee per unit, using the high and low points method.

2.      Assuming that she decided to enroll 18 units. How much will she pay on the date of enrollment if the total amount will be paid in four equal installments?

SOLUTION

 1.                                                                                                Tuition & Misc.     Number of

                                                                                                             Fees                   units     

High........................................................................................           P 12,530                   27

Low.........................................................................................             4,550                     6

Difference...............................................................................           P 7,980                   21

Variable rate (Tuition fee).......... 7,980 / 21 = P380 per unit

Fixed cost (Misc. Fee)....... = P12,530  ‑ (P380 x 27) = P2,270

2.

Variable Cost (Tuition Fee)     380  x 18 =      6,840

Fixed Cost  (Misc. Fee)                                    2,270

Total Amount                                                  9,110

                                                                        x  ¼   

Amount to be paid during enrollment      P2,277.50