Sharp EL-120 Manuel d'utilisateur télécharger pdf (Page 16)

CHAPTER 3. FINANCIAL CALCULATOR MODE

3.1 Normal mode

TheNORMALmodeallowsustousetheﬁnancial keys. The ﬁnancial keys N , 1/Y ,

PV , PMT , FV can only be used when the exponent in the applicable formula consists

of a single number (not a product or sum of numbers).

Before using the ﬁnancial keys, ﬁrst clear the register by pressing

2ndF M-CLR 0, 0.

3.2 Interest rates

3.2.1 Simple interest

I = Prt

• Determine the amount of interest received if R1 200 is invested for 4 years at 14%

simple interest per year.

I = Prt

= 1 200 × 14% × 4

= 1 200 × 0,14 × 4

= 672,00

The interest received is R672,00. We cannot use the ﬁnancial keys because there is no

exponent in the formula.

Key in as

1 200

× 0.14 × 4 =

The answer is 672,00.

S = P (1 + rt)

• Determine the accumulated amount for if R2 400 is invested for 42 months at a 9%

simple interest rate per year.

S = 2 400



1+9%×



= 2 400



1+0,09 ×



= 3 156,00.

The accumulated amount is R3 156,00.

Key in as

2 400

( 1 + 0.09 × 42 ÷ 12 =

The answer is 3 156,00.

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Sharp EL-120 Manuel d'utilisateur Page 16