Determination of TO speeds and use of FLEX/TOGA at very low TOW

[flavioromero12]

Gentlemen,

After checking the FCOM Airbus 320, PER-TOF-TOC-12-30 EXTRAPOLATION

For a takeoff weight lower than those displayed on the chart, associated speeds are calculated as follows :
1. For given configuration and wind, note the speeds associated with the takeoff weight in the row displaying the highest permissible temperature.
2. Apply speed corrections provided at the bottom of the RTOW chart to V1 , VR and V2 limited to the minimum speeds.

Which means we need to subtract 1 Knot to V1/Vr/V2 per TON (1,000 kg) to that weight displayed on the last row of the RTOW chart (considering the wind conditions) limited to the minimum speeds displayed on the RTOW chart.

And then use those speeds for Takeoff.

Now, the questions is:
Considering EXTRAPOLATION (FCOM PER-TOF-TOC-12-30) is only mentioned on TAKEOFF CHARTS - MTOW CALCULATION (TEMPERATURE ENTRY) and not in TAKEOFF CHARTS - FLEXIBLE TAKEOFF (TEMPERATURE ENTRY) Am I supposed to use TOGA and use those low weight corrected speeds or can I use the lowest FLEX TEMP on the chart (FLEX TO) and the low weight corrected speeds?

Also consider:
1. TAKEOFF CHARTS - MTOW CALCULATION (TEMPERATURE ENTRY) PER-TOF-TOC-12-30 only considers the USE of TOGA.
2. PER-TOF-TOC-14-10 TAKEOFF CHARTS - FLEXIBLE TAKEOFF (TEMPERATURE ENTRY) CORRECTIONS PRODUCED ON THE RTOW CHART
first point says: "Enter the chart with wind and selected configuration. Interpolate for actual takeoff weight. Read flexible temperature associated with this weight.

"interpolate for actual takeoff weight" We can't because the weight is not on the chart (is actually Lower than the ones displayed). That would be EXTRAPOLATION.

please reference all your answers. Thank you!