it still made her feel uncomfortable to know she was rich and she knew she would never be so rich that she would forget how she used to sit pouring over her cheque stubs and adding and re-adding her accounts in the hope that more money would materialise , how she used to unpick sylvias jumpers so that she could re-knit the wool into a sweater for tom , how she would wear laddered tights as long as the ladders remained out of sight above her knee , how she would make a pound of mince stretch into enough meals for two days .