Hi Vicky,
Total amount is:
https://www.amazon.com/dp/B01HQAXBKM/ref=wl_it_dp_o_pC_S_ttl?_encoding=UTF8&colid=17XIG4JFV0VU4&coliid=I1TTF1R7456P91&th=1&psc=1
USD21.01 + USD 7.55 + USD 7.36 = USD35.92 (SGD 52.80)
Less amt transferred $57.90, excess amt = $5.10
Thanks!