Just pay the amount you want to pay (X), and they can calculale the number of shares (Y)
Y= X/5.25
Easy
Don't be distracted by the instructions. (need to take up 100% before you can apply for top up). If the amount you send in is lower than 100% of your entitlement, then you get the amount you want, maybe 80%. If the amount you send in is higher, then you get 100% of your entitlement plus whatever amount is over and above.
TPM Price at posting:
$5.96 Sentiment: Buy Disclosure: Held