White sauce

Am trying to figure out whether it will work out cheaper (syn wise) to make my own or to use a packet... could some kind person please give me the syn values forColmans Savoury White Sauce Mix 25g and Bisto White Sauce Granules 170g Thank you!
Loopy x

Colman's Savoury White Sauce Mix, dried 25g sachet

5 Syns on Extra Easy

Original 5 Syns

Green 5 Syns
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Bisto White Sauce, dried 1 level dsp

2½ Syns on Extra Easy

Original 2½ Syns

Green 2½ Syns
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Thank you