Store

The company has three industrial goods stores. The following data are available:

Store	Sales September	Sales October	Price September CZK/pcs	Price October CZK/pcs
A	1500	1800	39	40
B	700	721	36	35
C	300	279	34	35
Total	2500	2800	X	X

Determine the changes in the average price of the product sold.

Final Answer:

A =   %
B =   %
C =   %

Step-by-step explanation:

$$\begin{gathered} c_1=(39\cdot 1500+40\cdot 1800)/(1500+1800)=\frac{435}{11}\doteq 39.5455 \\ A=100\cdot (c_1-39)/39=100\cdot (39.5455-39)/39=\frac{200}{143}\doteq 1.3986=\% \end{gathered}$$

$$\begin{gathered} c_2=(36\cdot 700+35\cdot 721)/(700+721)=\frac{7205}{203}\doteq 35.4926 \\ B=100\cdot (c_2-36)/36=100\cdot (35.4926-36)/36\doteq -1.4094=\% \end{gathered}$$

$$\begin{gathered} c_3=(34\cdot 300+35\cdot 279)/(300+279)=\frac{6655}{193}\doteq 34.4819 \\ C=100\cdot (c_3-34)/34=100\cdot (34.4819-34)/34\doteq 1.4173=\% \end{gathered}$$

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