18. Inventories
 
   Group  Company 
   31 March 
2022 
Rm 
31 March 
2021 
Rm
 
31 March 
2022 
Rm 
31 March 
2021 
Rm
 
Inventories  1 084  1 026  833  779 
Gross inventories  1 244  1 180  940  891 
Write-down of inventories to net realisable value  (160) (154) (107) (112)
Inventories consist of the following categories:  1 244  1 180  940  890 
Installation material, maintenance material and network equipment  541  477  540  476 
Merchandise  703  703  400  414 
Write-down of inventories to net realisable value  160  154  107  112 
Opening balance  154  158  112  124 
Charged to selling, general and administrative expenses  15  22  15  22 
Inventories written off  (9) (26) (20) (34)

In line with the Group strategy, the Group's inventory increased in the current financial period due to the accelerated deployment of fibre which required additional inventory to be purchased.

During the current financial year, R33 million (31 March 2021: R42 million) for Group and R33 million (31 March 2021: R41 million) for Company was transferred from inventories to property, plant and equipment. The transfers only take place from CWIP.