# Find the total number of packets the pharmacy sold over the 16 weeks of the winter period?

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A pharmacy notices that their sales of cold medications increases steadily from the beginning of May. Their sales records show that last year they sold 26 packets of cold tablets in the first week in May. The sale of cold tablets increased by seven packets each week.

A pharmacy notices that their sales of cold medications increases steadily from the beginning of May. Their sales records show that last year they sold 26 packets of cold tablets in the first week in May. The sale of cold tablets increased by seven packets each week.

##### 1 Answer

The pharmacy sold

#### Explanation:

In the first week, the pharmacy sold 26 packets and the number of packets increased by 7 each week

so your pattern should look something like this:

Using arithmetic sequence, we can solve this question

where

In this case,

You could also just add all your numbers up by finding your 16 terms and adding them altogether

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