Excel for calculating charges min. max. cap

hi all experts,

i need this very urgently.

i need a code to calculate the amount of charges and if the value is < 5 the value will be 5 and if it is over 50, it is cap at max 50.

the % is 0.03125.

this code will calculate the amount of charges.

for example, if user type in 10,000. the code will calculate 10000 x 0.03125% and the value is 3.125 but i need the value to be shown as 5 (min. cap at 5).

if user type in 300,000. the code will calculate 300,000 x 0.03125% and the value is 93.75 but i want the value to be cap at 50.

please assist. thank you.