Anyone please solve this problem under short cut method.. iam getting 3000 and 1800 as answer

please refer the answer below. Your answer is also correct Dear. Interest on Drawings. Case 1 ........ = 48000 x 10/100 x7.5/12= 3000. Case 2. ........ =48000x 10/100 x4.5/12 = 1800