Fixed, Just Changed below line
format: '<b>{point.name}</b>: {point.percentage:.1f} %',
to
format: '<b>{point.name}</b>: {point.y:.1f} Rs.',
Fixed, Just Changed below line
format: '<b>{point.name}</b>: {point.percentage:.1f} %',
to
format: '<b>{point.name}</b>: {point.y:.1f} Rs.',