BPP Revison Kit question.

I had a question about question 4.1 and 4.4 of BPP F3 revision kit.
Q. Marshalls opening cash balance was $224 and an overdraft of $336, the following transactions took place in that month:
May 1, Sold $160 of goods to P Dixon on Credit
May 1. WIthdrew $50 from the business
May 2. Purchased goods from A Clarke on Credit for $380 less 15% trade discount
May 2. Repaid a dept of $120 owing to R Hill, taking advantage of a 10% settlement discount. The payment was by cheque
May 3. Sold $45 of goods for cash
May 4. Sold $80 of gods to M Maguire on credit, offering a 12.5% discount If payment made within 7 days. Marshall expects Maguire to take up the discount
May 4, Paid a phone bill of $210
May 4. Received a cheques from H Larkin for $180
May 5. Sold $304 of goods to M Donald on credit.
May 5. Purchase $315 of goods from Honour Co by Cheque
May 6 Recieve a Cheque from D Randle for $482
May 6 Purchased $100 of goods from G Perkins

Q4.1 What is the total of the sales day book?
A$544
B$589
C$534
D$579
The right answer is C
I picked D but according to the explanation the sales on May 3 arent considered as a sale, which I don’t understand why.

Q4.2 What is the total of the purchase day book?
A$880
B$823
C$1033
D$958
The right answer is B
I picked D and again the explanation doesn’t include the purchase of goods on May 5 in the purcahse day book. I dont know why they arent included. Could someone explain that to me?
Thanks