Royal Plan: £6 p/m & £59

Answer:

If We use only 200 same network and 150 other network minutes per month, then our total cost of it under both plan we will be?

Under Gem Plan:

First 150 minutes is free for same network and other network,

So there is charge of 50 extra minute for same network at 25p.

So, 50 * 0.25

= 12.5

So, total monthly cost is,

5.49 + 12.5 = 17.99

Here 5.49 is plan cost per month

So total annual bill is,

17.99 * 12 = 215.88

Then add annual fee,

215.88 + 54.99

= 270.87

So total annual cost in this plan is 270.87

Now under Royal plan:

Here first 200 minutes for same network are free and 100 minutes for other network,

So there is charge of 50 extra minute for other networks at 32p.

So, 50*0.32

= 16

So, total monthly cost is,

6 + 16 = 22

here 6 is plan cost per month

So total annual bill is,

22 * 12 = 264

Then add annual fee,

264+ 59.49

= 323.49

So total annual cost in this plan is 323.49

So saving under Gem plan is,

Total cost of Royal plan - Total cost of Gem plan

= 323.49 - 270.87

= 52.62

So option a is correct answer.