Every day she buys $3.75 latte and $3.50 croissant for a total of 3.75+3.50 = $<<3.75+3.50=7.25>>7.25 per day
If she spends $7.25 a day for 7 days she will spend 7.25*7 = $<<7.25*7=50.75>>50.75 in one week
If she buys 5 cookies at $1.25 each she will spend 5*1.25 = $<<5*1.25=6.25>>6.25
Her gift card is for $100 and she spends $50.75 and an additional $6.25 that will leave her with 100-50.75-6.25 = $<<100-50.75-6.25=43.00>>43.00 on her gift card
#### 43