Company 5

The Photo-Lab company offers developing digital photos in the size of 9 x 13 cm for 2,- CZK per photo. However, it adds a flat fee of 50,- CZK to the order (for any number of photos taken). Calculate what price we actually pay for 1 photo if we order 1, 5, 20, 100 photos.

Correct answer:

a =  52 Kc
b =  12 Kc
c =  4.5 Kc
d =  2.5 Kc

Step-by-step explanation:

$$\begin{gathered} n_1=1 \\ f=2\text{Kc} \\ p=50\text{Kc} \\ a=\frac{f\cdot n_1+p}{n_1} \\ a=f+p/n_1=2+50/1=52\text{Kc} \end{gathered}$$

$$\begin{gathered} n_2=5 \\ b=f+p/n_2=2+50/5=12\text{Kc} \end{gathered}$$

$$\begin{gathered} n_3=20 \\ c=f+p/n_3=2+50/20=4.5\text{Kc} \end{gathered}$$

$$\begin{gathered} n_4=100 \\ d=f+p/n_4=2+50/100=2.5\text{Kc} \end{gathered}$$

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