Please be aware that swaps for GBPJPY are stated in terms of points as shown under swap type in specifications.
Therefore, the calculation for swap fees based on your sell trade would be:
Swap fee = trade size * long/short points * pointsize = (0.3 * 100,000) * -10.77 * 0.001
= - 32.31 JPY = -0.233 USD
Please be aware that we charge triple swaps for holding GBPJPY every Wednesday-Thursday rollover. Therefore the swap for one day would have to be multiplied by 3.
Triple swap = -0.233 * 3 = -0.7 USD