A mate put me on to this sunscreen last year. Ended up being a great Christmas present for the family. It's all paraben/preservative-free/environmentally friendly etc.
Anyway, SKINNIES35 gives you 35% storewide. The triple pack seems like a great deal ($84.50) - https://skinnies.com.au/products/conquer-spf50-3-pack
From Cancer Council website
From Skinnies website
Of course, this will vary depending on the body and face size, and texture of the product. I don't think pea-size is sufficient sunscreen. I like to follow the two-finger rule when applying sunscreen.
I haven't tried the product. However, always apply more than you think you need. There are plenty of elegant budget-friendly sunscreens on the market. Happy to share if anyone is interested.
Edit: Some more words.